This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Sexual offences and infanticide, Subject name: Forensic Medicine
[{'content': "Following are tests to confirm blood stains except \nSelect and explain. \nA. Phenolphthalein test, B. Takayamma test, C. Florence test, D. Teichmann's test", 'role': 'user'}, {'content': "Answer: C \nExplanation: To find out whether the stain is blood or Not: 1. Catalytic color test Phenolphthalein test Oho-toluidine test Benzedine test 2. Crystal test Hemin crystal test(Teichmann's test) Hemochromogen crystal test(Takayamma test) Ref: FORENSIC MEDICINE AND TOXICOLOGY Dr PC IGNATIUS THIRD EDITION PAGE 317", 'role': 'assistant'}]