This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Sexual offences, Subject name: Forensic Medicine
[{'content': 'Onanism is otherwise known as:- \nSelect and explain. \nA. Masturbation, B. Sodomy, C. Buccal coitus, D. Fetishism', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Onanism / Ipsation /masturbation: self-stimulation which effects sexual arousal', 'role': 'assistant'}]