Answer : 3. "1973 "
Explanation :

1. In the year 1973, the Rajasthan Lokayukta and Up Lokayukta Ordinance was passed, which became effective in Rajasthan from February 3, 1973.

2. It received the approval of His Excellency the President on March 26, 1973 and since then it is effective in the state in the form of an Act.