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: Pediatrics
[{'content': 'Rapid antigen test for meningitis organisms in a child can be done on the following specimens EXCEPT– \nSelect and explain. \nA. Blood, B. CSF, C. Urine, D. Throat swab', 'role': 'user'}, {'content': 'Answer: D \nExplanation: All books have mentioned CSF as a specimen for the detection of antigen.\nNo book has mentioned urine or blood.\nBut, amongst the given options, best answer is throat swab because other three are body fluids in which antigens can be detected.', 'role': 'assistant'}]