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
Odourless poisoning is:- 
Select and explain. 
A. Cannabis, B. Datura, C. Phenol, D. Chloral hydrate
B: Datura
Answer: B: Datura 
Explanation: 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