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
Brown colored urine is seen in the : 
Select and explain. 
A. Nitric acid poisoning, B. Carbolic acid poisoning, C. Sulphuric acid poisoning, D. Hydrochlric acid poisoning
A: Nitric acid poisoning
Answer: A: Nitric acid poisoning 
Explanation: A i.e. Nitric acid