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': 'Dried semen stains on clothes identified by - \nSelect and explain. \nA. Spectrometry, B. UV rays, C. Infrared rays, D. LASER', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ref: the synopsis of forensic medicine &toxicology-Dr.K.S. Narayana reddy 28th edition pg no:236 proof of semen: the only absolute prrof of semen is the finding of atl;east one unbroken spermatozoon,or electrophoretic LDH isoenzyme detection of sperms. in the absence of spermatozoa, a stain which gives characteristic fluorescence in ultraviolet light , a high level of acid phosphatase , a high creatine phosphokinase and P30 can be considerd due to semen', 'role': 'assistant'}]