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: Medicine
[{'content': 'Vitamin B6 deficiency is associated with all of the following except \nSelect and explain. \nA. Penicillamine, B. INH, C. Cyclosporin, D. Cycloserine', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]