This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Injuries by Firearms, Subject name: Forensic Medicine
[{'content': 'Primary & secondary markings over metal bullet help in? \nSelect and explain. \nA. Identification of weapon, B. Identification of wound, C. Identification of person, D. Severity of tissue damage', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Identification of weapon o Primary markings (class characteristics) and secondary markings (metallic fouling, individual or accidental characteristics) on a bullet can be used for identification of weapon.", 'role': 'assistant'}]