## Core Concept
The question pertains to the urea cycle, a series of biochemical reactions that occur in many animals, where it plays a crucial role in removing excess nitrogen from the organism. The urea cycle converts ammonia, which is toxic, into urea, which is much less toxic and can be excreted. Arginine is a key intermediate in this cycle.

## Why the Correct Answer is Right
The hydrolysis of arginine in the urea cycle is catalyzed by the enzyme arginase. This reaction breaks down arginine into urea and ornithine. The reaction is as follows: Arginine + H2O → Urea + Ornithine. This step is critical for the completion of the urea cycle and for the production of urea, which is then excreted.

## Why Each Wrong Option is Incorrect
**Option A:** This option is incorrect because it does not accurately represent the products of arginine hydrolysis in the urea cycle.
**Option B:** This option is incorrect because, although ornithine is indeed a product of arginine hydrolysis, it is not the correct answer given that the question seems to focus on the other product.
**Option D:** This option is incorrect because it inaccurately represents the product related to arginine hydrolysis.

## Clinical Pearl / High-Yield Fact
A key point to remember is that defects in the urea cycle, such as deficiencies in arginase, can lead to hyperammonemia and related neurological symptoms. The urea cycle is vital for detoxifying ammonia.

## Correct Answer: C.