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
An addict develops delusion, misleading hallucination of sight and hearing and the feeling of creeping things of "grains of sand" in the skin,he is addicted is - 
Select and explain. 
A. Heroin, B. Methadone, C. Cocaine, D. Amphetamines
C: Cocaine
Answer: C: Cocaine 
Explanation: None