Which is the third most important food grain of Karnataka?
The main crops grown in Karnataka are Rice, Ragi, Jowar (sorghum), maize, and pulses (Tur and gram) in addition to oilseeds and several other cash crops. In Karnataka, Ragi is the third most important food grain after paddy and Jowar. Tumkur District of Karnataka is the top region for ragi production in India.
Hence, option C is the correct answer.