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: Pediatrics
[{'content': "In Glanzman's thrombasthenia, there is a defect of \nSelect and explain. \nA. Gp IIb / IIa, B. Gp IIb / IIIa, C. Gp Ib / IX, D. Gp IIb / IX", 'role': 'user'}, {'content': "Answer: B \nExplanation: Glanzman's thrombasthenia\n\nPlatelet aggregation defect\nIIb / IIIa Gp deficient", 'role': 'assistant'}]