Answer : 1. "भीलवाड़ा, चित्तौड़गढ़ और उदयपुर"
Explanation :

1. Maximum production of maize is in the southern and south-eastern parts of Rajasthan. These areas have high temperatures and rainfall, which is favourable for maize cultivation.

2. Highest producing districts of maize in Rajasthan which include Bhilwara, Chittorgarh, Udaipur, Banswara, and Dungarpur.