This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Forensic Toxicology - Concepts, Statutes, Evidence, and Techniques, Subject name: Forensic Medicine
Green colour urine is found in: 
Select and explain. 
A. Oxalic acid, B. Hematuria, C. Carbolic acid, D. Chyluria
C: Carbolic acid
Answer: C: Carbolic acid 
Explanation: Ans. (C). Carbolic acid(Ref: The Essentials of Forensic Medicine and Toxicology by KS Narayan Reddy. 29th edition 2010. Pg:478)Urine colourConditionsGreenCarboluriaQRed* Haematuria* Myoglobinuria- there will be a brownish-red colour.* Haemoglobinuria- with intravascular HEMOLYSIS* "Pink diaper syndrome"- there is a pinkish discolouration on the diaper secondary to urate crystals in the urine.Vin rose* Use of Deferoxamine will cause vin rose coloured urine if serum Fe is elevated.Brown or black* Nitric acid poisoningQ* Haemoglobin* Nitrofurans* Alkaptonuria- on standing, the urine will turn a dark colour.Blue* Presence of indigo or of methylene blueQMilky or cloudy* Pus cells and bacteria in the urine* ChyluriaOrange coloured* Rifampicin