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': 'Precursor for the synthesis of testosterone is: \nSelect and explain. \nA. Aldosterone, B. Cholesterol, C. Pregnenolone, D. Cortisol', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Pregnenolone or Progesterone are the precursors for the synthesis of testosterone, aldosterone, estradiol and\xa0cortisol.', 'role': 'assistant'}]