Gynaecology & Obstetrics Androgenic activity of the 19 noestosterone nucleus is decreased by ? A Adding alkyl group at C 17 B Removal of methyl group at C 19 C Adding methyl group at C 18 D Substituting chlorine atom at C21 💡 Explanation Androgenic activity of the 19 noestosterone nucleus is decreased by ? ✓ Correct Answer: B. Removal of methyl group at C 19