Answer : 2. "जयपुर"
Explanation :

1. For the first time in the country, an international seminar on mustard and oilseeds was organized in Jaipur.

2. All India Oilseeds Coordinated Research Project (AICRPO) was established in April 1967 by the Indian Council of Agricultural Research to improve oilseeds in the country.

3. The National Mustard Research Center was established on October 20, 1993, to conduct basic, strategic and applied research on rye mustard at the Adaptation Testing Center, Sewar, Bharatpur of the State Agriculture Department, Government of Rajasthan.