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: Radiology
[{'content': 'Treatment for post-radiation skin lesion like desquamation: March 2013 (e) \nSelect and explain. \nA. Petroleum jellies, B. Observation alone, C. Surgery, D. Antibiotic coverage', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B i.e. Observation alone', 'role': 'assistant'}]