Gynaecology & Obstetrics Diagonal conjugate is: A Distance between upper border of symphysis and sacral promontory B Lower border of symphysis and sacral promontory C Lower border of symphysis and 3rd piece of sacrum D Lower border of symphysis and tip of sacrum 💡 Explanation Diagonal conjugate is: ✓ Correct Answer: B. Lower border of symphysis and sacral promontory