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': "Barberio's test uses which of the following ? \nSelect and explain. \nA. Picric acid, B. Acetic acid, C. Hydrochloric acid, D. Sulfuric acid", 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Picric acid Barberio's test It is used to diagnose presence of seminal/ spermatic fluid. Procedure : A saturated aqueous or alcoholic solution of picric acid when added to spermatic fluid produces yellow needle - shaped rhombic crystals of spermine picrate. The reaction probably depends on the presence of the prostatic secretion.", 'role': 'assistant'}]