This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Death and Investigations, Subject name: Forensic Medicine
[{'content': 'Hydrostatic test is used to determine - \nSelect and explain. \nA. Presence of smegma, B. Live birth, C. Criminal abortion, D. Buccal coitus', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Live birth * Has been explained in previous sessions", 'role': 'assistant'}]