Gynaecology & Obstetrics Which of the following pelvic diameter measures the distance from the lower margin of the symphysis to the sacral promontory? A Transverse diameter B Diagonal conjugate C Obstetric conjugate D True conjugate diameter 💡 Explanation Which of the following pelvic diameter measures the distance from the lower margin of the symphysis to the sacral promontory? ✓ Correct Answer: B. Diagonal conjugate