This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolism of protein and amino acid, Subject name: Biochemistry
[{'content': 'Albinism is due to deficiency of \nSelect and explain. \nA. Tyrosinase, B. Homogentisate oxidase, C. Fumaryl acetoacetate hydrolase, D. Chylomicrons', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Tyrosinase is completely absent, leading to defective synthesis of melaninRef: DM Vasudevan - Textbook of Biochemistry, 7th edition, page no: 238, fig 18.7', 'role': 'assistant'}]