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': 'A Pt. has eccbymoses and petechiae all over the body with no hepatosplenomegaly. All are true except - \nSelect and explain. \nA. Increased megakaryocytes in bone narrow., B. Bleeding into the joints, C. Decreased platelet in blood, D. Disease resolves itslef in 80% of Pt. in 2-6 weeks.', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]