Answer : 2. "सवाई माधोपुर"
Explanation :

In the year 1953, Asia's largest cement factory was established in Sawai Madhopur district of Rajasthan. Its name is "Jaipur Udyog Limited". This factory started in 1959 and remained operational till 1986. The factory employed 2,500 workers and produced 1.2 million tonnes of cement per year.