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
[{'content': 'Priapism occurs in: \nSelect and explain. \nA. Snakebite., B. Ratti poisoning, C. Cantharide poisoning, D. Arsenic poinsoning', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e. Cantharide Poisoning Cantharidin is an animal poison produced by cantharides (Spanish fly or blister beetle). It causes vesicle or blister formation (on local application), strangury and priapismQ (on ingestion)', 'role': 'assistant'}]