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
[{'content': 'Tyrosine deficiency causes ? \nSelect and explain. \nA. Depression, B. Hypehyroidism, C. Hyperpigmentation, D. Phenylketonuria', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Depression Tyrosine deficiency causes hypothyroidism (lethargy, weight gain) as tyrosine is required for T3 & T4; depression (due to dopamine deficiency); albinism & hair hypopigmentation (due to deficiency of melanin); and stunted growth (as tyrosine is a component of proteins).", 'role': 'assistant'}]