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': "Porphobilinogen in urine produces pink colour with- \nSelect and explain. \nA. Fouchet's reagent, B. Benedict's reagent, C. Sodium nitroprusside, D. Ehrlich's aldehyde reagent", 'role': 'user'}, {'content': "Answer: D \nExplanation: Ehrlich's aldehyde reagent test\xa0is used for porphobilinogen and urobilinogen in urine. It is mainly used in acute intermittent porphyria.\n\nAbout other options\n\nSodium nitroprusside (Rothera's test) → For ketone bodies\nBenedict's test\xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0→ Glucose and other reducing sugars in urine\nFouchet's (barium sulphate) test\xa0 \xa0 \xa0 \xa0 \xa0→ Bile pigment (bilirubin)", 'role': 'assistant'}]