**Core Concept**
Spermin is a polyamine compound found in human semen, and its detection is an important aspect of forensic medicine and reproductive biology. The detection of spermin is often used to determine the presence of semen in a sample, which can be crucial in investigations involving sexual assault or paternity suits.

**Why the Correct Answer is Right**
The correct answer involves the use of a chemical test that specifically detects spermin in a sample. This test typically involves the use of a reagent that reacts with spermin to produce a colored compound, which can be visualized under a microscope or using a spectrophotometer. The reaction is usually based on the ability of spermin to chelate metal ions, such as copper or zinc, which are then detected by the reagent.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it is not a specific test for spermin. While some tests may involve the detection of other compounds found in semen, such as fructose or choline, they are not specific for spermin.
**Option B:** This option is incorrect because it is a test for a different compound found in semen, such as fructose or choline. While these tests may be useful in forensic medicine, they are not specific for spermin.
**Option C:** This option is incorrect because it is a test for a different type of compound altogether, such as DNA or proteins. While these tests may be useful in forensic medicine, they are not specific for spermin.

**Clinical Pearl / High-Yield Fact**
The detection of spermin in semen is often used in conjunction with other tests, such as DNA analysis or protein detection, to determine the presence of semen in a sample. This can be an important aspect of forensic medicine and reproductive biology, particularly in cases involving sexual assault or paternity suits.

**Correct Answer: C. Acid phosphatase test**