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
Margnan's syndrome also called cocaine bugs is seen in? 
Select and explain. 
A. Cannabis overdose, B. Datura poisoning, C. Cocaine poisoning, D. Opium poisoning
C: Cocaine poisoning
Answer: C: Cocaine poisoning 
Explanation: This syndrome is seen in cocaine  poisoning. It is a tactile hallucination person feels as if insects are creeping under the skin.