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': 'Which is not true regarding Bernard soulier syndrome? \nSelect and explain. \nA. Ristocetin aggregation is normal, B. Aggregation with collagen and ADP is normal, C. Large platelets, D. Thrombocytopenia', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]