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
Which of the following is not common metabolite of progesterone excreted in urine? 
Select and explain. 
A. Pregnanelone, B. Pregnanetriol, C. 17-hydroxy pregnenolone, D. Pregnanediol
D: Pregnanediol
Answer: D: Pregnanediol 
Explanation: 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.