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
Delusion of persecution and formication occur together in 
Select and explain. 
A. LSD, B. Amphetamine, C. Cocaine, D. Canabis
C: Cocaine
Answer: C: Cocaine 
Explanation: C i.e. Cocaine