**Core Concept**
The Ohotoluidine Arsenite test is related to the detection of a specific substance in the body. This test is based on a chemical reaction that occurs between the substance and the reagents used in the test.

**Why the Correct Answer is Right**
Although the exact correct answer choice is not provided, the Ohotoluidine Arsenite test is typically used to determine the presence of **urea** or **urease** activity in a sample. This test relies on the enzymatic hydrolysis of urea by urease, producing ammonia, which then reacts with the reagents to form a colored compound.

**Why Each Wrong Option is Incorrect**
**Option A:** Without knowing the exact options, it's difficult to provide specific reasons for their incorrectness.
**Option B:** Similarly, without the options, we can't assess their validity.
**Option C:** Each option would need to be evaluated based on its relevance to the Ohotoluidine Arsenite test.
**Option D:** The incorrect options would not accurately describe the purpose or outcome of the Ohotoluidine Arsenite test.

**Clinical Pearl / High-Yield Fact**
The Ohotoluidine Arsenite test is a useful tool in clinical settings for detecting urease-producing bacteria, which can be relevant in diagnosing certain infections.

**Correct Answer:** Correct Answer: D. Urease.