**Core Concept**
The patient presents with primary amenorrhea, which is the failure to menstruate by the age of 16 in the presence of normal secondary sexual characteristics. This condition can result from a variety of anatomical or hormonal abnormalities.

**Why the Correct Answer is Right**
The patient's presentation of well-developed breasts and pubic hair suggests the presence of estrogen, which is essential for the development of these secondary sexual characteristics. However, the absence of a vagina and uterus indicates a congenital anomaly of the female reproductive system. This is consistent with Mayer-Rokitansky-Küster-Hauser (MRKH) syndrome, a rare congenital disorder characterized by the absence or underdevelopment of the vagina and uterus, despite the presence of normal ovaries and estrogen production.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is likely incorrect as it does not provide a specific diagnosis that accounts for the patient's presentation of well-developed breasts and pubic hair in conjunction with the absence of a vagina and uterus.

**Option B:** This option may be incorrect as it does not specifically address the patient's condition, which is characterized by the absence of a vagina and uterus despite normal secondary sexual characteristics.

**Option C:** This option may be incorrect as it does not provide a clear diagnosis that accounts for the patient's presentation. It may be a distractor, but without more information, it is difficult to determine its relevance.

**Clinical Pearl / High-Yield Fact**
MRKH syndrome is a rare congenital disorder that affects approximately 1 in 4,500 to 1 in 5,000 females, and it is essential to consider this diagnosis in patients with primary amenorrhea and normal secondary sexual characteristics.

**Correct Answer: D. Mayer-Rokitansky-Küster-Hauser (MRKH) syndrome**