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': 'All of the following method used for detecting heavy metals, except - \nSelect and explain. \nA. Harrison & Gilroy test, B. Paraffin test, C. Neutron activation analysis, D. Atomic adsorption spectroscopy', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Tests used in firearm discharge\n\n\nBased on detection of nitrate : Dermal nitrite (Paraffin) test.\nBased on detection of heavy metal: Harrison and Gilroy test, neutron activation analysis, Atomic absorption spectroscopy, and flameless atomic absorption spectroscopy.', 'role': 'assistant'}]