Microbiology 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