Which of the following is the largest producer of maize in India?

Karnataka

The correct answer is option 1: Karnataka

NCERT: "The leading producers of maize are the states of Karnataka, Madhya Pradesh, Bihar, Andhra Pradesh, Telangana, Rajasthan and Uttar Pradesh. Yield level of maize is higher than other coarse cereals. It is high in southern states and declines towards central parts."