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
Precursor for the synthesis of testosterone is: 
Select and explain. 
A. Aldosterone, B. Cholesterol, C. Pregnenolone, D. Cortisol
C: Pregnenolone
Answer: C: Pregnenolone 
Explanation: Pregnenolone or Progesterone are the precursors for the synthesis of testosterone, aldosterone, estradiol and cortisol.