**Core Concept:** The female pelvis is a complex structure that plays a crucial role in supporting the gravid uterus and facilitating childbirth. The shape of the subpubic angle is an important distinguishing feature between different pelvic bones.

**Why the Correct Answer is Right:** The correct answer, **D** - Ischial tuberosity is everted and obturator foramen is small and triangular - is based on the specific anatomical details of the female pelvis. In this case, the ischial tuberosity is everted (projecting outward), which is a unique feature in females. Additionally, the obturator foramen is small and triangular in shape, further distinguishing the female pelvis from males.

**Why Each Wrong Option is Incorrect:**

A. Subpubic angle is V-shaped - This option is incorrect because the female pelvis has a U-shaped subpubic angle, not V-shaped.
B. Subpubic angle is U-shaped and obtuse - This option is also incorrect as the female subpubic angle is U-shaped but acute (sharp), not obtuse (blunt).
C. Preauricular sulcus is prominent - This option is not relevant to the correct answer as it refers to a different anatomical feature, unrelated to the shape of the pelvis.

**Clinical Pearl:** The everted ischial tuberosity and triangular obturator foramen in females are crucial for understanding the unique adaptations in the female pelvis that allow for childbirth and the support of the gravid uterus. This knowledge is essential for medical professionals to provide appropriate clinical care and diagnosis of any related pathologies.

**Correct Answer:** D. Ischial tuberosity is everted and obturator foramen is small and triangular.