Where is Pushkar Fair held?

The Pushkar Fair (also called the Kartik Mela or Pushkar Camel Fair) is Rajasthan's best-known annual religious-cum-livestock fair, held every year around Kartik Purnima at the pilgrimage town of Pushkar — famous for its sacred lake and Brahma temple, and for large-scale camel and cattle trading.

Pushkar town lies about 15 km from Ajmer city, within Ajmer district in Rajasthan, near the Aravalli hill range. Since the fair takes place at Pushkar itself, the district it falls under among the options given is Ajmer.

The other three options name separate Rajasthan districts, none of which contains Pushkar:

• Jaipur — Rajasthan's capital, known for its forts and pink-city Old City architecture; a separate district that does not host this fair.

• Udaipur — known as the "City of Lakes" for Lake Pichola and the City Palace; also a separate district, unrelated to Pushkar's location.

• Jodhpur — the "Blue City", known for Mehrangarh Fort; again a distinct district that does not include Pushkar.

So, among the options given, the Pushkar Fair is held in Ajmer district.