**Core Concept**
Congenital toxoplasmosis is a condition where Toxoplasma gondii, a protozoan parasite, is transmitted from mother to fetus during pregnancy, leading to various systemic complications in the newborn. This condition can occur when a pregnant woman acquires the infection for the first time, or when the parasite reactivates from a previous, latent infection.

**Why the Correct Answer is Right**
Toxoplasmosis in the fetus can lead to a range of clinical manifestations, including chorioretinitis, hydrocephalus, intracranial calcifications, and hepatosplenomegaly. The parasite's ability to evade the host's immune system and establish a persistent infection in the fetus contributes to the severity of the disease.

**Why Each Wrong Option is Incorrect**
**Option A:** Chorioretinitis is a common finding in congenital toxoplasmosis, characterized by inflammation and scarring of the retina, which can lead to vision loss. This option is **correct** and not the answer we are looking for.
**Option B:** Hydrocephalus (fluid accumulation in the brain) is a possible consequence of congenital toxoplasmosis, often due to the formation of cysts in the brain tissue. This option is also **correct** and not the answer we are looking for.
**Option C:** Intracranial calcifications are a hallmark of congenital toxoplasmosis, resulting from the parasite's invasion of the brain tissue and subsequent calcification of the infected areas. This option is also **correct** and not the answer we are looking for.
**Option D:** Hypokalemia (low potassium levels) is not a direct consequence of congenital toxoplasmosis. While electrolyte imbalances can occur in various clinical scenarios, they are not a characteristic feature of this condition.

**Clinical Pearl / High-Yield Fact**
Toxoplasmosis is a zoonotic disease, meaning it can be transmitted from animals to humans. Pregnant women can acquire the infection through contact with contaminated cat feces or undercooked meat, highlighting the importance of proper hygiene and food handling practices during pregnancy.

**Correct Answer:** D. Hypokalemia