**Core Concept**
The question tests the understanding of genetic testing methods used for detecting specific aneuploidies, which are conditions where an individual has an abnormal number of chromosomes. **Aneuploidy** detection is crucial in prenatal diagnosis and genetic counseling.

**Why the Correct Answer is Right**
Since the correct answer is not provided, let's discuss the common tests used for detecting aneuploidy. Tests like **Fluorescence In Situ Hybridization (FISH)**, **Chorionic Villus Sampling (CVS)**, and **Amniocentesis** are used for detecting specific aneuploidies.

**Why Each Wrong Option is Incorrect**
**Option A:** Without the specific test named, we can't directly address why it's incorrect, but typically, options might include tests that are indeed used for aneuploidy detection, making them incorrect choices for this question.
**Option B:** Similarly, without specifics, we assume it could be a test used for aneuploidy, thus incorrect for the question's context.
**Option C:** Again, lacking specifics, we'd expect this to be a method used in genetic testing, thus not the answer.
**Option D:** This would follow the pattern, being a test used for aneuploidy detection, making it an incorrect choice for the question asked.

**Clinical Pearl / High-Yield Fact**
A key point to remember is that **Non-Invasive Prenatal Testing (NIPT)** has become a significant tool for screening for common aneuploidies, though it's not diagnostic. Understanding which tests are diagnostic versus screening is crucial.

**Correct Answer:** Correct Answer: D. Maternal serum screening.