On per vaginal examination, anterior fontanelle and supraobital ridge is felt in the second stage of labour. The presentation is :-
**Core Concept**
The question is testing the student's knowledge of fetal presentation during labor, specifically the characteristics of a transverse lie and the implications for vaginal examination.
**Why the Correct Answer is Right**
In the second stage of labor, a vaginal examination may reveal the anterior fontanelle and supraorbital ridge, which are indicative of a transverse lie. This occurs when the baby's head is positioned across the mother's abdomen, rather than in an anteroposterior or oblique position. The anterior fontanelle is the soft spot on the top of the baby's head, and the supraorbital ridge is the bony ridge above the eye socket. Feeling these landmarks during a vaginal examination suggests that the baby is not in a normal vertex presentation, but rather in a transverse lie.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because it does not accurately describe the clinical findings associated with a transverse lie.
* **Option B:** This option is incorrect because it implies a different type of presentation or lie, which is not supported by the clinical findings described in the question.
* **Option C:** This option is incorrect because it suggests a different type of presentation or lie, which is not supported by the clinical findings described in the question.
**Clinical Pearl / High-Yield Fact**
In a transverse lie, the baby's head is positioned across the mother's abdomen, which can increase the risk of complications during delivery, including prolonged labor and obstructed labor.
**Correct Answer: C. Transverse lie.**