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
A case of murder with gunshot is repoed. A metal bullet is recovered from the body. Primary and Secondary markings on a metal bullet can be used for 
Select and explain. 
A. Identification of weapon, B. To know the range of firing, C. Severity of tissue damage, D. To known tome of crime
A: Identification of weapon
Answer: A: Identification of weapon 
Explanation: A i.e. Identification of weapon - Primary markings (class characteristics) and secondary markings (metallic fouling, individual or accidental characteristics) on a bullet can be used for identification of weaponQ. - Bullet is picked up with handsQ. Gunshot residue on hands can be detected by Dermal nitrate testQ.