This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Poisoning, Subject name: Forensic Medicine
Which of the following is not an aryl phosphate? 
Select and explain. 
A. TIK 20, B. Malathion, C. Parathion, D. Follidol
B: Malathion
Answer: B: Malathion 
Explanation: Organophosphate poisoning is the most common poisoning in India followed by aluminium phosphide. Organophosphorus compounds are classified as 1. Alkyl compounds -- such as tetraethyl pyrophosphate (TEPP), hexa ethyl tetraphosphate (HETP), octa methyl pyrophosphate (OMPA), malathion etc. 2. Aryl compounds -- such as parathion, chlorothion, diazinon (Tik-20), paraoxon etc. REF;THE SYNOPSIS OF FORENSIC MEDICINE:KS NARAYANA REDDY;28th EDITION;PAGE NO 291