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: Psychiatry
[{'content': 'All are adulterants of Heroin, except : \nSelect and explain. \nA. Chalk powder, B. Quinine, C. Charcoal, D. Fructose', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e. Charcoal Eleven adulterants were identified with a frequency of occurrence that exceeded 5% Most commonly found compounds: Quinine), Mannitol, Lactose, ProcaineOther substances found included: Caffiene, Sucrose), Chalk(), Powder milk, Talcum powder, Starches etc.', 'role': 'assistant'}]