This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Amino Acids Basics, Subject name: Biochemistry
[{'content': 'Both glucogenic and ketogenic amino-acids are all except - \nSelect and explain. \nA. Phenylalanine, B. Tyrosine, C. Tryptophan, D. Leucine', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Leucine", 'role': 'assistant'}]