This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nutrition and health, Subject name: Social & Preventive Medicine
Sorghum is pellagrogenic due to excess content of 
Select and explain. 
A. Lysine, B. Threonine, C. Leucine, D. Tryptophan
C: Leucine
Answer: C: Leucine 
Explanation: Jowar (sorghum) Jowar is also known as kaffir corn or Milo. It is a major crop grown in India next only to wheat and rice. For several population groups, it is a staple diet. The protein content of jowar varies from 9 to 14 per cent, and the proteins are limiting in lysine and threonine. Ceain varieties of jowar have a high leucine content and consumption of these varieties is associated with pellagra. This disorder is often seen in the Telengana and Marathwada regions where jowar is predominantly consumed. Ref:Park's Textbook of Preventive and Social Medicine 23th Ed Pgno: 628