This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Microbiology
Which of the following antibacterial substance is
present in eggs and saliva? 
Select and explain. 
A. Lysozyme, B. Secretozyme, C. Albumin, D. Isozyme
A: Lysozyme
Answer: A: Lysozyme 
Explanation: None