Question

Given below are two statements:
Statement I : Obstetric conjugate is distance between midpoint of sacral promontory to inner surface of symphysis pubis.
Statement II : Diagonal conjugate is distance between lower border of symphysis pubis to midpoint on sacral promontory.
In the light of the above statements, choose the most appropriate answer from the options given below:

• A. Both Statement I and Statement II are correct
• B. Both Statement I and Statement II are incorrect
• C. Statement I is correct but Statement II is incorrect
• D. Statement I is incorrect but Statement II is correct

Hint:

Remember — the obstetric conjugate is the true diameter, while the diagonal conjugate is measured clinically to estimate it.

Answer 1

The Correct Option is A

The obstetric conjugate is an important measurement in obstetrics as it represents the smallest anteroposterior diameter through which the fetal head must pass.
It is the distance from the midpoint of the sacral promontory to the nearest point on the inner surface of the symphysis pubis.
This matches Statement I, so Statement I is correct.
The diagonal conjugate is a clinical measurement used to estimate the obstetric conjugate.
It is measured from the lower border of the symphysis pubis to the midpoint of the sacral promontory, which matches Statement II.
Therefore, both statements are factually correct.
So, the right answer is that both Statement I and Statement II are correct.