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: Biochemistry
[{'content': "Prophobilinogen in urine produces pink colour with which of the following reagent? \nSelect and explain. \nA. Fouchet's reagent, B. Benedict's reagent, C. Sodium nitropruside, D. Ehrlich's aldehyde reagent", 'role': 'user'}, {'content': "Answer: D \nExplanation: Prophobilinogen, urobilinogen and stercobilinogen reacts with Ehrlich's aldehyde reagent to form red colour. Ref: Vasudevan Biochemistry, 4th Edition, Pages 256, 493", 'role': 'assistant'}]