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
Which of the following is meant by the term 'Sin of Gomorrah'? 
Select and explain. 
A. Oral sex, B. Anal sex, C. Bestiality, D. Lesbianism
A: Oral sex
Answer: A: Oral sex 
Explanation: Oral sex is also called coitus per os or Sin of Gomorrah or buccal coitus. According to Bible the sin was common in a town called: Gomorrah, so the name. It is included in Unnatural sexual offences Act (S.377 IPC). Ref: The Essentials of Forensic Medicine and Toxicology by Dr. K. S. Narayan Reddy, 27th edition, Page 365.