This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Toxicology - 3, Subject name: Forensic Medicine
Most common abused substance is: 
Select and explain. 
A. Datura, B. Marijuana, C. Cocaine, D. Heroin
B: Marijuana
Answer: B: Marijuana 
Explanation: Cannabis / marijuana:Most commonly abused substance in India Opium: Derived from Papaver somniferum; poison of choice for suicide Heroin / brown sugar: Synthetic derivative of opium Datura: Roadside poison or railway poison Cocaine: Obtained from dried leaves of Erythroxylum coca