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
Magnan's syndrome is associated with: WB 09; BHU 09; MP 11; AFMC 12; NEET 14 
Select and explain. 
A. Cocaine, B. OPC, C. Snake bite, D. Alcohol
A: Cocaine
Answer: A: Cocaine 
Explanation: Ans. Cocaine