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
Onanism is: TN 07 
Select and explain. 
A. Natural sexual offence, B. Unnatural sexual offence, C. Perversion, D. Indecent assault
C: Perversion
Answer: C: Perversion 
Explanation: Ans. Perversion