**Core Concept**
Rokitanski-Kuster Hauser (RKH) syndrome, also known as Mayer-Rokitansky-Küster-Hauser (MRKH) syndrome, is a congenital disorder characterized by the underdevelopment or absence of the vagina and uterus in females. This condition is often associated with other anomalies, including renal, skeletal, and cardiovascular abnormalities.

**Why the Correct Answer is Right**
The pathogenesis of RKH syndrome is thought to be related to the abnormal development of the Müllerian ducts during embryogenesis. The Müllerian ducts give rise to the female reproductive tract, including the fallopian tubes, uterus, and upper part of the vagina. In RKH syndrome, the Müllerian ducts fail to develop properly, resulting in the absence or underdevelopment of these structures. This is often accompanied by the presence of a normal or rudimentary external genitalia.

**Why Each Wrong Option is Incorrect**
* **Option A:** This is incorrect because while renal abnormalities may be present in some cases of RKH syndrome, they are not a defining characteristic of the condition.
* **Option B:** This is incorrect because skeletal abnormalities are not typically associated with RKH syndrome, although some cases may exhibit vertebral or rib anomalies.
* **Option C:** This is incorrect because cardiovascular abnormalities are not a common feature of RKH syndrome, although some cases may exhibit associated cardiac defects.

**Clinical Pearl / High-Yield Fact**
RKH syndrome should be distinguished from other causes of vaginal agenesis, such as androgen insensitivity syndrome, which is characterized by the presence of testes and external genitalia that appear female but are insensitive to androgens.

**Correct Answer: D.**