**Core Concept**
Infanticide, the intentional killing of an infant, can be tested for using various methods, but not all tests are used for this purpose. The underlying principle being tested is the ability to differentiate between tests used for infanticide and those used for other purposes.

**Why the Correct Answer is Right**
The correct answer is related to the fact that infanticide tests are used to determine the cause of death in infants, and different tests are used depending on the suspected cause. For example, tests like the Kastle-Meyer test and the Griess test are used to detect the presence of blood, while other tests like the Duboscq-Brazfield test are used to detect the presence of other substances.

**Why Each Wrong Option is Incorrect**
**Option A:** This test is actually used for detecting the presence of blood, making it an incorrect choice.
**Option B:** This test is used for detecting the presence of other substances, not typically for infanticide testing.
**Option C:** This test is not commonly used for infanticide testing, and its use is limited to other purposes.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that the choice of test depends on the suspected cause of death and the type of substances present. A thorough understanding of the different tests and their applications is crucial in forensic medicine.

**Correct Answer:** D