Knockout drops are -
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.
Paraldehyde
Chloral hydrate
Kerosene
Turpentine
Forensic Toxicology - Concepts, Statutes, Evidence, and Techniques