This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ballistics, Subject name: Forensic Medicine
[{'content': 'Stellate wound is produced with firearm in \nSelect and explain. \nA. Contact shot, B. Close shot, C. Range within 60 cm, D. Distant shot', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Stellate wound is a characteristic of a contact wound. Specific appearances of contact shot: Muzzle/Recoil imprint mark is regarded as a patterned abrasion/ intradermal contusion caused by the expansive power of the gases lifting the skin forcibly up against the muzzle.- Characteristic imprint marks can provide clues to the type of the firearm and its position at the time of discharge. Back spatter: In a contact shot, the muzzle blast and negative pressure in the barrel may suck blood, hair, fragments of tissues and cloth fibers back into the barrel. Blowback phenomenon: Cruciate, stellate or ragged laceration is seen, especially if there is a thick bone immediately under the skin, such as the skull. This occurs as a result of expansion of gases beneath the skin and their exit through the entry wound (in contact wounds).', 'role': 'assistant'}]