This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Forensic Medicine
[{'content': "5 yr old boy was presented to the OPD by his mother with complaints of pain in the perineal region on examination of sample taken with nitric acid from his peri'anal region showed yellow crystal of what is the test done \nSelect and explain. \nA. Teichmann's test, B. Barberios test, C. Takayama test, D. Florence", 'role': 'user'}, {'content': "Answer: B \nExplanation: Barberio's test : Basis Detection of Spermin Procedure A few drops of Barberio's reagent when added to spermatic fluid produces crystals of sperm in picrate needle shaped rhombic & yellow color ref : narayanareddy", 'role': 'assistant'}]