**Core Concept**
Multicystic Dysplastic Kidney (MCDK) is a congenital anomaly where the kidney develops abnormally, leading to the formation of multiple cysts. This condition is often associated with urinary tract abnormalities and can have implications for fetal development and maternal health.

**Why the Correct Answer is Right**
Option C, stating that unilateral MCDK leads to Potter sequence, is incorrect. Potter sequence typically occurs in cases of bilateral renal agenesis or severe bilateral renal dysplasia, not unilateral MCDK. The Potter sequence is characterized by the presence of oligohydramnios, pulmonary hypoplasia, and characteristic facial features. Unilateral MCDK does not typically lead to these complications, as the unaffected kidney usually takes over the renal function.

**Why Each Wrong Option is Incorrect**
**Option A:** This statement is true. Unilateral multicystic dysplastic kidney is indeed more common than bilateral MCDK, as bilateral involvement often results in more severe renal impairment and is often incompatible with life.

**Option B:** This statement is also true. If MCDK is isolated and unilateral, the prognosis is generally good. The unaffected kidney usually compensates for the loss of function, and the child can lead a normal life.

**Option D:** This statement is true as well. Bilateral MCDK has a poor prognosis due to the severe impairment of renal function, which can lead to oligohydramnios and associated complications such as pulmonary hypoplasia and Potter sequence.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that the presence of a unilateral MCDK does not necessarily lead to Potter sequence, as the unaffected kidney can compensate for the loss of function. However, bilateral MCDK is associated with a poor prognosis and a high risk of complications.

**Correct Answer Line**
✓ Correct Answer: C. Unilateral MCDK leads to potter sequence