Least common type of pelvis is :
**Core Concept**
The question is testing knowledge of pelvic anatomy, specifically the classification of pelvis types. In obstetrics, the pelvis is classified into four main types: gynecoid, android, anthropoid, and platypelloid.
**Why the Correct Answer is Right**
Although the exact correct answer is not provided, the least common type of pelvis is generally considered to be the **platypelloid** type, which is characterized by a short, broad pelvis with a wide transverse diameter. This type of pelvis is less common due to its unusual shape, which can sometimes pose challenges during childbirth.
**Why Each Wrong Option is Incorrect**
**Option A:** The gynecoid pelvis is the most common type, making it an unlikely candidate for the least common.
**Option B:** The android pelvis, also known as the male type, is less common than the gynecoid but more common than the platypelloid.
**Option C:** The anthropoid pelvis, characterized by a long, narrow shape, is also more common than the platypelloid type.
**Clinical Pearl / High-Yield Fact**
It's essential to recognize that the shape and size of the pelvis can significantly impact childbirth, with certain types being more conducive to vaginal delivery than others. The **platypelloid** pelvis, being the least common, is also associated with potential difficulties during labor.
**Correct Answer:** D. Platypelloid pelvis