This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Sickle Cell Disease, G6PD deficiency and other Hemolytic Anemia, Subject name: Medicine
[{'content': 'In sickle cell crisis bone pain is due to: \nSelect and explain. \nA. Bone infarction, B. Osteroporosis, C. Osteomalacia, D. Periosteal reaction', 'role': 'user'}, {'content': 'Answer: A \nExplanation: In sickle cell crisis bone pain is due to bone infarction. RBC are sticky, so branching blood vessels gets occluded leading to infarction. "Fish mouth veebra" seen in sickle cell anemia.', 'role': 'assistant'}]