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
[{'content': 'Coloured urine is not seen in : \nSelect and explain. \nA. Quinine, B. Rifampcin, C. Nitrofurantoin, D. Pyridium', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Answer is A (Quinine) Quinine is not associated with discoloured urine.', 'role': 'assistant'}]