**Core Concept**
Cleft lip, polydactyly, and holoprosencephaly are characteristic features of a genetic syndrome that results from an early developmental abnormality in the brain and face. This syndrome is associated with a failure of midline fusion and an abnormality in the development of the forebrain, leading to a spectrum of congenital anomalies.

**Why the Correct Answer is Right**
Holoprosencephaly is a brain malformation that occurs when the forebrain fails to properly divide during embryonic development. This results in a range of anomalies, including cleft lip and palate, which are caused by the failure of the upper lip to properly form. Polydactyly, or extra fingers, can also occur due to the abnormal development of the limbs. The correct answer is associated with this syndrome because of its characteristic features of midline facial defects, brain malformations, and limb abnormalities.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because it is not associated with the characteristic features of holoprosencephaly and cleft lip, polydactyly.
* **Option B:** This option is incorrect because it is not typically associated with the characteristic features of holoprosencephaly and cleft lip, polydactyly.
* **Option D:** This option is incorrect because it is not a known syndrome associated with cleft lip, polydactyly, and holoprosencephaly.

**Clinical Pearl / High-Yield Fact**
Holoprosencephaly can be caused by genetic mutations, environmental factors, or a combination of both. It is essential to recognize the characteristic features of this syndrome to provide appropriate prenatal counseling and postnatal care.

**Correct Answer:** C. Meckel-Gruber Syndrome.