This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Proteins, Fats, Rich Sources, Subject name: Social & Preventive Medicine
[{'content': 'Limiting amino acids in wheat are: \nSelect and explain. \nA. Methionine and lysine, B. Lysine and threonine, C. Threonine and methionine, D. Arginine and lysine', 'role': 'user'}, {'content': "Answer: B \nExplanation: Amino acids most deficient in proteins of a food item are 'Limiting amino acids'. Food Item Limiting Amino Acid(s) Cereals Threonine (& Lysine) Pulses Methionine (& Cysteine) Maize Tryptophan (& Lysine) - As wheat is a cereal, limiting AA are Lysine & threonine.", 'role': 'assistant'}]