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: Forensic Medicine
[{'content': 'Which is the most common organ affected in primary blast injury? \nSelect and explain. \nA. Lung, B. Ear, C. Skin, D. Bowel', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Most common organ affected in primary blast injury is ear. The next common organ is spleen.', 'role': 'assistant'}]