This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Special topics, 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: Ref:The essential of forensic medicine and toxicology Dr.K.S NARAYAN REDDY 32nd edition pg no 415 Barberio's test :a saturated aqueous or alcoholic solution of picric acid when added to the spermatic fluid produces yrllow needle shaped rhombic crystal of spermine picrate reaction probably depens on the presence of prostatic secretion", 'role': 'assistant'}]