Post-Graduate Institute of Medical Education and Research is situated at

Concept: An institute of national importance in India is created by a specific Act of Parliament (or, for a state institute, by state legislation) that fixes one city as the institute’s official seat or headquarters. That named seat is the institute’s location, regardless of how widely its graduates or services later operate across the country.

Application: The Post-Graduate Institute of Medical Education and Research (PGIMER) was declared an Institute of National Importance under the Post-Graduate Institute of Medical Education and Research, Chandigarh, Act, 1966, with its campus and headquarters fixed at Chandigarh (Sector 12). So the correct answer is Chandigarh.

Cross-check: Each of the other offered cities is genuinely home to a different, well-known medical institution, which is why they can seem tempting if the names are confused:

• Kolkata is the seat of the Institute of Post Graduate Medical Education and Research (IPGMER), a West Bengal state government institute affiliated with SSKM Hospital.

• New Delhi is the seat of the All India Institute of Medical Sciences (AIIMS), declared an Institute of National Importance under a 1956 Act of Parliament.

• Mumbai is the seat of the Seth G. S. Medical College and King Edward Memorial (KEM) Hospital, run by the Brihanmumbai Municipal Corporation.

None of these three institutions is the Post-Graduate Institute of Medical Education and Research named in the question; only the Chandigarh-based institute carries that exact name.