This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Biochemistry
[{'content': 'Which of the following is not common metabolite of progesterone excreted in urine? \nSelect and explain. \nA. Pregnanelone, B. Pregnanetriol, C. 17-hydroxy pregnenolone, D. Pregnanediol', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Pregnanediol, or 5b-pregnane-3a,20a-diol, is an inactive metabolic product of progesterone.found especially in the urine of pregnant women and during the premenstrual and luteal phases of the menstrual cycle.', 'role': 'assistant'}]