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The correct answer is B.

• 'Royal Calcutta', established in 1829, is the second oldest golf course in the world after St Andrews in Scotland.
• The golf game was introduced in Europe around the 15^th century.
• The golf field is wide and full of green-grass. This ground is called 'Golf Course'.​
• The capital of England is London, and it is the most populous city here.
• London is situated on the banks of the "Thames" river**.**
• The capital of Italy is "Rome" and Italy is situated on the banks of the "Tiber" River.

Given,

Here we see the top and bottom images are same in the left side similarly right-side images will follow the same pattern.

∴ 

Hence, the correct answer is A. 1.

The correct answer is C.

• The top institution of international chess competition is "Federation Internationale des Echecs" (FIDE).
• The World Youth and Cadet Chess Championship were held between October 24 and November 6, 2015, in Porto Caras, Mildadiki, Greece.
• "Masood Mossadeghpour" of Iran won the gold medal by topping the Open U-18 category of the championship.
• While in the girl's U-18 category, "Aman Mahalakshmi" of India won the gold medal with the top position and Veen Varshini won the silver medal.
• India topped the championship by winning a total of 11 medals including 5 gold, 3 silver, and 3 bronze.

Concept used:

Follow the BODMAS rule to solve this question, as per the order given below,

Calculation:

0.1404 ÷ 0.06 = (1404/10000) ÷ (6/100)

⇒ (1404/10000) × (100/6)

⇒ 234/100

∴ 2.34

Calculation:

If we rotate a square ABCD, we'll get the following shapes:

After the fourth rotation, it will be the same as the first figure

∴ Rotational symmetry is 4

The correct answer is D.

• The national dress of any country sustains the cultural traditions of that country.
• Different countries have their own different clothes -

The correct answer is C.

• The first polio vaccine was developed by 'Jonas Salk' and first tested in 1952.
• "Albert Bruce Sabin" was a Polish American medical researcher known for developing the "oral polio vaccine".
• "Edward Jenner" was an English doctor and inventor of the 'smallpox vaccine'.
• Jenner is called the 'father of immunology'.
• Alexander Fleming, the inventor of penicillin, was a biologist and pharmacologist of Scotland.

Given,

A. Mercury

B. Quicksilver 

C. Hydrargyrum

D. Bromos

Here we see Mercury, Quicksilver, Hydrargyrum all are same.

Bromos is a sedative containing Bromide.

Hence, the correct answer is D. Bromos.

The correct answer is C.

• Under this scheme, any person can issue a postage stamp containing a photo of himself or any of his family by spending Rs 300.
• The customer can use this scheme for sending posts or for special occasions.
• The Indian Postal Department celebrates 'World Postal Week' from 9 to 14 October.
• Warren Hastings established the first post office in Kolkata in the year 1774.
• The postal system was first introduced in India in the year 1766.
• 'World Post Day' is celebrated on 6 October.​

The correct answer is D.

• Greenhouse gas is a mixture of gases that are neither visible nor capable of infrared radiation.
• Greenhouse gases allow short-wavelength radiation from the Sun to come to Earth but increase the Earth's temperature by absorbing long-wavelength radiation from the Earth.
• Naturally found greenhouse gases in the atmosphere are carbon dioxide, methane, water vapour and nitrous oxide.
• The most prominent greenhouse gas is carbon dioxide (70 %).
• These greenhouse gases cause global warming problems.
• If there was no greenhouse gas on the earth, the temperature of the earth would be very low because this gas is helpful in making the temperature of the earth.