**Core Concept**
The child's presentation of seizures and oval hypo-pigmented macules on the trunk suggests a neurocutaneous disorder. These conditions are characterized by the association of skin lesions with neurological abnormalities. The likely diagnosis involves a genetic disorder affecting the development of the nervous system and the skin.

**Why the Correct Answer is Right**
The child's symptoms are most likely due to tuberous sclerosis complex (TSC), a genetic disorder caused by mutations in either the TSC1 or TSC2 gene. This results in the formation of hamartomas in multiple organs, including the skin, brain, and kidneys. The oval hypo-pigmented macules, also known as ash-leaf spots, are a hallmark of TSC. These skin lesions are caused by the abnormal development of melanocytes due to the loss of function of the TSC2 protein, which normally regulates the mTOR pathway.

**Why Each Wrong Option is Incorrect**
* **Option A:** Neurofibromatosis type 1 is another neurocutaneous disorder, but it is characterized by café-au-lait macules, neurofibromas, and Lisch nodules, which are not present in this child.
* **Option B:** Sturge-Weber syndrome is a condition that presents with a port-wine stain on the face, seizures, and glaucoma, but it does not typically involve oval hypo-pigmented macules.
* **Option C:** Incontinentia pigmenti is a genetic disorder that affects the skin, hair, teeth, and central nervous system, but it is characterized by whorled or swirled hyperpigmentation, not hypo-pigmentation.

**Clinical Pearl / High-Yield Fact**
Tuberous sclerosis complex is an autosomal dominant disorder, meaning that a single copy of the mutated gene is sufficient to cause the condition. It is essential to recognize the characteristic skin lesions and neurological abnormalities to make an early diagnosis and prevent complications.

**Correct Answer:** C.