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
Magnan syndrome is seen in which poisoning - 
Select and explain. 
A. Morphine, B. Alcohol, C. Cannabis, D. Cocaine
D: Cocaine
Answer: D: Cocaine 
Explanation: Altered tactile sensation: the person feel that some small insects are crawling on his skin. This is known as Magnan's symptom or cocaine bugs (formication). REF;THE SYNOPSIS OF FORENSIC MEDICINE:KS NARAYANA REDDY;28th EDITION;PAGE NO 347