This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General surgery, Subject name: Surgery
[{'content': 'Most common area of pressure sore is \nSelect and explain. \nA. Ischium, B. Greater trochanter, C. Sacrum, D. Heel', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Pressure sore frequency in descending order Ischium Greater trochanter Sacrum Heel Malleolus (lateral than medial) Occiput Bailey and Love 27e pg: 29', 'role': 'assistant'}]