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: Unknown
[{'content': 'In Glanzmann thrombasthenia, the defect is \nSelect and explain. \nA. Decreased platelets, B. Defective adhesion, C. Defective aggregation, D. Defective secretion of granules', 'role': 'user'}, {'content': 'Answer: C \nExplanation: It is due to defective aggregation because of surface deficiency of GP II b- IIIa.', 'role': 'assistant'}]