Question

Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : When Biparietal diameter of fetus stretches the Vulval outlet.
Reason (R) : This is called as crowning of the head.
In the light of the above statements, choose the most appropriate answer from the options given below:

• A. Both (A) and (R) are correct and (R) is the correct explanation of (A)
• B. Both (A) and (R) are correct but (R) is NOT the correct explanation of (A)
• C. (A) is correct but (R) is not correct
• D. (A) is not correct but (R) is correct

Hint:

Crowning occurs when the biparietal diameter fully stretches the vulval outlet — an important sign of imminent delivery.

Answer 1

The Correct Option is A

The biparietal diameter (BPD) is the largest transverse diameter of the fetal head.
During labor, when the BPD stretches and distends the vulval outlet, the widest part of the fetal head is seen at the vaginal opening.
This stage is specifically known as crowning — it means that the fetal head no longer recedes between contractions and remains visible at the vulva.
Therefore, both the Assertion (A) and Reason (R) are correct.
Additionally, (R) correctly explains (A) because crowning is defined by the BPD stretching the vulval outlet.
So, option (1) is the correct answer.