**Core Concept**
Lysozyme is an enzyme that exhibits antimicrobial properties by cleaving the bacterial cell wall, specifically the peptidoglycan layer. This action disrupts the osmotic balance within the bacterial cell, ultimately leading to cell lysis and death.

**Why the Correct Answer is Right**
The correct answer is related to the presence of lysozyme in human tears and saliva. Lysozyme works by hydrolyzing the 1,4-beta-linkages between N-acetylmuramic acid and N-acetylglucosamine in the peptidoglycan layer of bacterial cell walls, leading to bacterial cell death. The enzyme is also found in other bodily secretions, such as mucus and lung secretions.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is not specified, so we cannot evaluate its correctness.

**Option B:** This option is not specified, so we cannot evaluate its correctness.

**Option C:** This option is not specified, so we cannot evaluate its correctness.

**Clinical Pearl / High-Yield Fact**
Lysozyme is an example of a non-antibiotic antimicrobial agent, highlighting the body's innate ability to combat microbial infections through enzymatic activity.

**Correct Answer:** D.