Explanation:

- Delhi (Option 3) is indeed the correct answer. According to the 2011 Census of India, Delhi ranked as the second highest populated metro area in India, following Mumbai.

- Mumbai (Option 4) holds the position as the highest populated metro in India, with a bustling cityscape and vibrant culture.

- Bengaluru (Option 1) is known as the Silicon Valley of India, and while it is among the top populated cities, it is not the second highest.

- Chennai (Option 2) is a major cultural, economic, and educational center in South India, but it also does not have the second highest population per the 2011 Census.