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The correct answer is Uttarkashi .

Key PointsNehru Mountaineering Institute:

• It is a premier mountaineering institute working under the aegis of the Ministry of Defence and the Government of Uttarakhand.
• It was established at Uttarkashi on 14 November 1965 to honour the desire of Pt. Jawahar Lal Nehru.
• It is the only mountaineering institute in India certified by the International Federation for Climbing and Mountaineering- UIAA.
• President: Rajnath Singh (Defence Minister of India), Vice-President: Pushkar Singh Dhami ( Chief Minister of Uttarakhand).
• NIM trainees and its alumni played a major role during the Kedarnath floods in 2013.

Thus, the Nehru Institute of Mountaineering is located at Uttarkashi.

Confusion PointsDon't confuse it with The National Institute of Mountaineering and Allied Sports (NIMAS) is located in Dirang, Arunachal Pradesh, India. It was established in 2010 by the Government of India's Ministry of Defense to promote mountaineering and allied sports in the country.

The correct answer is by the smell of human body.

Key Points

Mosquito:

• Mosquitoes use many methods to locate us.
• Mosquitoes can find you by the smell of your body.
• They also find you by the smell of the sole of your feet and the heat of your body.
• Mosquitoes are attracted to the carbon dioxide humans and other animals emit.
• They also use their receptors to pick up on other cues like perspiration to find a potential host.
• It’s only the female mosquitoes who do the biting.
• Male mosquitoes feed solely on plant nectar.
• The females seek out blood in order to develop and nourish their eggs.

Thus, mosquitoes locate human beings to bite by their use of the sense of smell.

The correct answer is (A), (B) and (C).

Key Points

Characteristics of Weeds:

• Weeds are unwanted, persistent, harmful plants.
• Undesirable weeds are plants that grow alongside the main plants.
• These impede the growth of other crop plants and negatively impact human activities.
• They also affect agricultural production, natural phenomena, and the national economy.
• Xanthium and Parthenium are examples of weeds.

Thus, (A), (B) and (C) are correct.

The correct answer is (A) is true but (R) is false.

Key Points

• Plants primarily absorb water through their root systems, which take up water from the soil. This process is essential for transporting nutrients and maintaining turgor pressure in plant cells.
• Rainwater is often more beneficial for plants than tap water because it is free from chemicals such as chlorine and fluoride, which are often found in domestic water supplies.
• During dry periods, irrigation systems or other water sources supplement natural rains to ensure that plants receive the water they need to survive and thrive.
• The apparent fresh look of plants after rain may be due to the washing away of dust and the increase in humidity, which can temporarily enhance the turgidity and vibrancy of plant leaves.

The correct answer is (A) and (D)

Key Points

• So that all children get a chance to read and write. This statement is correct.
• State-run schools aim to provide universal access to education, ensuring that every child has the opportunity to learn to read and write.
• These schools are established to promote literacy and educational equity among all sections of the society.
• So that only people of certain communities get a chance to read and write. This statement is incorrect.
• State-run schools are designed to be inclusive and serve children from all communities, without any discrimination.
• So that only the children of the family living below the poverty line get good education. This statement is incorrect.
• While state-run schools often target marginalized and economically disadvantaged children, they are open to all children, not just those below the poverty line.
• So that everybody may get a chance to learn something from each other. This statement is correct.
• State-run schools foster an environment where children from diverse backgrounds can interact and learn from each other, promoting social cohesion and mutual understanding.

Additional Information

• Inclusivity in State-run Schools
• State-run schools are established to ensure inclusive education, providing opportunities for all children to learn and grow together, regardless of their socio-economic background.
• These schools are funded by the government and aim to provide quality education and equal learning opportunities for every child.

The correct answer is  Only (A), (C) and (D).

Key Points

• We learn many things from each other in a family. This statement is correct.
• Family members share knowledge, skills, values, and traditions with each other, which contributes to the learning and development of all members.
• It is the custom of every house to remove the shoes before entering the house. This statement is incorrect.
• This custom is not followed universally. While some cultures and households practice this, it is not a common custom in every house.
• Some animals also live with us in our houses. This statement is correct.
• Many households have pets such as dogs, cats, birds, and other animals which live with the family members by choice.
• Some animals also live in our house without our permission. This statement is correct.
• Animals like mice, cockroaches, and spiders often enter and live in houses without the permission of the inhabitants.

The correct answer is (A) and (C) 

Key Points

• Oceans are all interconnected. This statement is correct.
• Oceans are interconnected through the world's oceanic system, forming a continuous body of water that covers about 71% of Earth's surface.
• Ocean water remains active only during the new moon and full moon. This statement is incorrect.
• Ocean water is continuously active due to various factors such as wind, gravitational forces of the moon and sun, and the Earth's rotation, not just during new moon and full moon phases.
• The three chief movements of ocean water are the waves, the tides and the ocean currents. This statement is correct.
• The primary movements of ocean water include waves (caused by wind), tides (caused by the gravitational pull of the moon and sun), and ocean currents (large-scale water movements driven by wind, water salinity, and temperature differences).
• The Atlantic Ocean is the largest ocean in size. This statement is incorrect.
• The Pacific Ocean is actually the largest ocean in size, covering more area than any other ocean on Earth.

Additional Information

• Oceanic Interconnection
• The world's oceans are interconnected and form a global oceanic circulatory system, known as the "global conveyor belt," which helps regulate climate and marine life distribution.
• Movements of Ocean Water
• Understanding the movements of ocean water is crucial for navigation, climate science, and marine biology. These movements include complex patterns that influence weather systems and sea life.

The correct answer is (C) and (D)

Key Points

• The peninsula is a piece of land that is surrounded by water on four sides. This statement is incorrect.
• A peninsula is a piece of land that is surrounded by water on three sides, not four.
• Pakistan is separated from India by the Palk Strait. This statement is incorrect.
• Pakistan is separated from India by the Radcliffe Line, not the Palk Strait. The Palk Strait actually separates India from Sri Lanka.
• Local time changes by four minutes for every one degree of longitude. This statement is correct.
• As the Earth rotates 360 degrees in 24 hours, it covers one degree of longitude every four minutes, thereby changing the local time accordingly.
• Large countries which stretch extensively from North to the South do not have a single Standard Time for the whole country. This statement is correct.
• Countries extending extensively from North to South, like Russia or the United States, often have multiple time zones due to their large geographical span.

Additional Information

• Standard Time and Time Zones
• Standard Time is the official time adopted across a country or region to regulate time differences. Large countries with significant longitudinal extent often adopt multiple time zones for accuracy and convenience.
• Longitude and Local Time
• Longitude plays a crucial role in determining local time. Each 15-degree change in longitude corresponds to a one-hour difference in local time.