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': 'Ammonia in brain is trapped by \nSelect and explain. \nA. Alanine, B. Glutamine, C. Ornithine, D. Aspaate', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e.,Glutamine The brain is a rich source of glutamine synthase and predominantly detoxifies ammonia by synthesis of glutamine.Glutamate + NH4 - Glutamine sythetase - Glutamine", 'role': 'assistant'}]