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': 'Branched chain amino acid which is both ketogenic and glucogenic ? \nSelect and explain. \nA. Leucine, B. Isoleucine, C. Valine, D. Tryptophan', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Isoleucine", 'role': 'assistant'}]