Progestreone has how many carbons -: (A) 18, (B) 19, (C) 21, (D) 20
Answer is C. Ans. is 'c' i.e., 21 o Steroid hormones are of 3 types :-21-carbon steroids (C21) - Progesterone, corticosteroids (glucocorticoids, mineralocorticoids).19-carbon steroids (C19) - Androgens (testosterone).18-carbon steroids (C18) - Estrogens.