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: Medicine
Coloured urine is not seen in : 
Select and explain. 
A. Quinine, B. Rifampcin, C. Nitrofurantoin, D. Pyridium
A: Quinine
Answer: A: Quinine 
Explanation: Answer is A (Quinine) Quinine is not associated with discoloured urine.