This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Toxicology - 1, Subject name: Forensic Medicine
[{'content': 'Odourless poisoning is:- \nSelect and explain. \nA. Cannabis, B. Datura, C. Phenol, D. Chloral hydrate', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Poisons and Smell * Organophosphorus compounds: Kerosene (due to the addition of AROMAX) * Arsenic, Aluminium phosphide: Garlic * Cannabis: Burnt rope * Smell of carrot: Hemlock (conium maculatum) * Alcohol: Fruity (due to congeners) * Cyanide: Bitter almond * Hydrogen sulphide: Rotten egg * Chloral hydrate/Paraldehyde: Acrid pear * Naphthalene: Moth ball * Salicylate: Menthol * Zinc phosphide: Fishy', 'role': 'assistant'}]