This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Forensic Toxicology - Concepts, Statutes, Evidence, and Techniques, Subject name: Forensic Medicine
[{'content': 'Knockout drops are - \nSelect and explain. \nA. Paraldehyde, B. Chloral hydrate, C. Kerosene, D. Turpentine', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Choral hydrate o The action of choral hydrate is so rapid that is has been given the name of'Knockout drops',o Mickey Finn: combination of choral hydrate and alcohol.", 'role': 'assistant'}]