Answer : 3. "ऊषा शर्मा "
Explanation :

1. The current Chief Secretary in Rajasthan is Usha Sharma.

2. Usha Sharma was born in 1960 in Jodhpur district of Rajasthan.

3. He received his bachelor's and master's degrees in political science from Delhi University. She joined the Indian Administrative Service (IAS) in 1985.