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
Maize are deficient in - 
Select and explain. 
A. Typtophan, B. Threonine, C. Methionine, D. Leucine
A: Typtophan
Answer: A: Typtophan 
Explanation: The proteins of maize are deficient in tryptophan and lysine. REF. PARK'S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICAL 21ST EDITION. PAGE NO-627