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: Important adulterants in heroin are starch (fructose & sucrose), caffeine, quinine, Paracetamol, scopolamine (Hyoscine), Noscapine, Lidocaine, Procaine, Phenobarbitone, Theophylline, Strychnine, Chalk, Flour, Talcum powder, Powdered milk, Phenacetin.', 'role': 'assistant'}]