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: Surgery
[{'content': 'The worst position for scars is - \nSelect and explain. \nA. Back, B. Shoulder, C. Sternum, D. Abdomen', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Scar over Sternum is a Precipitating factor for Hypertrophic scar.', 'role': 'assistant'}]