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
Chemically steroids are derivatives of 
Select and explain. 
A. Cholesterol, B. Ergosterol, C. Fatty acids, D. Perhydrocyclopentanophenantherene
A: Cholesterol
Answer: A: Cholesterol 
Explanation: Cholesterol is first acted upon by desmolasw and a 6 carbon unit is cleaved off, forming pregnenoloneProgesterone is the first steroid hormone formed from pregnenoloneProgesterone is fuher conveed in to glucocoicoids, mineralocoicoids and sex steroids Ref: DM Vasudevan, 7th edition, page no: 664, 665