This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Forensic Medicine
A Patient is admitted with Insomnia, Agitation, Diarrhoea, Dilated pupils and Sweating, what is the type of poisoning? 
Select and explain. 
A. Heroin, B. Cocaine, C. Cannabis, D. Ecstasy
A: Heroin
Answer: A: Heroin 
Explanation: Ans. A. Heroin* Insomnia, Agitation,Diarrhea and Altered sensorium* There may be white froth from mouth, in PM examination * Methadone is the drug of Choice