This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
Limiting amino acid in wheat are: 
Select and explain. 
A. Lysine, arginine, B. Threonine, methionine, C. Lysine, threonine, D. Lysine, methionine
C: Lysine, threonine
Answer: C: Lysine, threonine 
Explanation: Limiting amino acid in various food stuffs Wheat-lysine (the most deficient) and threonine (second limiting amino acid) Rice-lysine Legumes-tryptophan or methionine (or cysteine) Maize-lysine and tryptophan Egg-none; the reference for absorbable protein