Answer: The correct answer is B) the enzyme lysozyme present in your tears degrades bacteria.
Tears are the part of innate immunity, which is one of the two types of immune system ( innate and adaptive).
Innate immunity ( also called first line of defense) can be described as the generalized defense strategy of individual ( that is present from birth).
It includes certain physical and chemical barriers that are always ready to fight and clear pathogen.
For example- Lysozyme ( found in tears, saliva, mucus, and breast milk) degrade bacteria by breaking their cell wall and thus prevent infection.
Thus, option B) is the right answer.