Which among the following is the largest union territory of India in terms of population?

The correct answer is C) Delhi. In the 2011 Census, the National Capital Territory of Delhi had about 1.68 crore people, far ahead of any other union territory.

• Puducherry (about 12.5 lakh) is the second most populous UT, but it is less than a tenth of Delhi's population.
• Chandigarh (about 10.5 lakh) is a planned city and the capital of Punjab and Haryana, but it is small in population terms.
• Daman and Diu (about 2.4 lakh) is one of the smallest UTs. It was merged with Dadra and Nagar Haveli in January 2020.

Delhi became a UT with a legislature under the 69th Constitutional Amendment (1991), which inserted Article 239AA and created the NCT of Delhi. This distinction matters for Polity, since Delhi's government has limits on its powers over police, land and public order. It is a recurring Mains theme on Centre-state relations.

Trap: Many aspirants pick Puducherry because it is the best-known UT, or assume Jammu and Kashmir would top the list after it became a UT in 2019. J&K's 2011 population was about 1.25 crore, still smaller than Delhi's, so the answer does not change.