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
Ochronosis is seen in poisoning with: DNB 09; FMGE 11; NEET 13 
Select and explain. 
A. HCl, B. Boric acid, C. Oxalic acid, D. Carbolic acid
D: Carbolic acid
Answer: D: Carbolic acid 
Explanation: Ans. Carbolic acid