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
Gunshot residue on hands can be detected by: 
Select and explain. 
A. Phenolphthalein test, B. Dermal nitrate test, C. Benzidine test, D. Hydrogen activation analysis
B: Dermal nitrate test
Answer: B: Dermal nitrate test 
Explanation: B i.e. Dermal nitrate test