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
Formication and delusion of persecution occurs together in: 
Select and explain. 
A. LSD, B. Amphetamine, C. Canabis, D. Cocaine
D: Cocaine
Answer: D: Cocaine 
Explanation: Cocaine Formication is a form of tactile hallucination in which the patient feels that of insects are crawling on (or under) the skin. Delusion of persecution is false belief of being harassed or persecuted.