Gynaecology & Obstetrics Diagonal conjugate is defined as the distance between : A Upper border of symphysis pubis and the sacral Promontory B Lower border of symphysis pubis and the sacral Promontory C Lower border of symphysis pubis and the third piece of sacrum D Lower border of symphysis pubis and tip of sacrum 💡 Explanation Diagonal conjugate is defined as the distance between : ✓ Correct Answer: B. Lower border of symphysis pubis and the sacral Promontory