This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Special topics, Subject name: Forensic Medicine
[{'content': 'Semi-Smoke less black powder is a mixture of \nSelect and explain. \nA. 50% black powder + 50% smokeless powder, B. 60% black powder + 40% smokeless powder, C. 70% black powder + 30% smokeless powder, D. 80% black powder + 20% smokeless powder', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Semi-smokeless powder: It consists of a mixture of 80% black and 20% smokeless type Gunpowders: Black powder: It produces flame, smoke, and heat, and consists of granular ingredients, like sulfur, charcoal, and saltpeter (potassium nitrate) Smokeless powder: It is more effective than black powder as it burns more efficiently and produces much less smoke, resulting in less blackening and tattooing around the entry wound. Ref - Krishnan Vij 5th edition pg 238-240', 'role': 'assistant'}]