Given,
Statement:
Urban areas have expanded rapidly, but public transport has not kept pace. As a result, traffic congestion and air pollution have increased. Experts recommend massive investments in metro lines, electric buses, and last-mile connectivity to address urban mobility challenges.
Conclusions:
I. The lack of adequate public transport contributes to pollution in cities - Follow (Because the statement explicitly mentions that the lack of public transport has resulted in increased air pollution).
II. Improving public transport can reduce urban mobility problems - Follow (Because experts recommend investments in public transport solutions, which implies that improving public transport can mitigate mobility issues).
III. Urban growth is always a negative phenomenon - Does not follow (Because the statement does not suggest that urban growth is inherently negative, but rather highlights the need for better infrastructure to support it).
So, Only conclusions I and II follow.
Hence, the correct answer is "Option 2".