**Core Concept:** Face to pubis delivery refers to a specific position in obstetrics where the baby's head is directed towards the pubic symphysis during childbirth. This position ensures a smooth transition of the baby through the pelvic outlet and reduces the risk of complications like shoulder dystocia or brachial plexus injury.

**Why the Correct Answer is Right:** The correct answer is **D. Supine position with legs in stirrups** because in this position, the mother lies down with her legs elevated in stirrups, allowing the baby's head to assume a face-to-pubis position. This position facilitates the baby's descent through the maternal pelvis and aligns the baby's head optimally for delivery.

**Why Each Wrong Option is Incorrect:**

A. **Lithotomy position:** This position involves the mother lying in the lithotomy position (kneeling) with legs extended, which may not allow the baby's head to assume the face-to-pubis position, increasing the risk of complications.

B. **Sitting position:** Delivery in a sitting position is not recommended as it may lead to insufficient pelvic outlet expansion, causing difficulties in baby's head passage and increasing the risk of complications.

C. **Lateral position:** Delivery in lateral position is less commonly used and can lead to inadequate pelvic outlet expansion, causing an unfavorable head position and increasing complications.

**Clinical Pearl:** Proper positioning during childbirth plays a vital role in ensuring a safe delivery for both the mother and the baby. The face-to-pubis position helps facilitate a safe and smooth passage through the pelvic outlet.

**Correct Answer:** D. Supine position with legs in stirrups.