This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunology, Subject name: Microbiology
[{'content': 'Lysozyme is present in the following secretions of the body except - \nSelect and explain. \nA. Lacrimal secretions, B. CSF, C. Saliva, D. Respiratory tract secretions', 'role': 'user'}, {'content': "Answer: B \nExplanation: Lysozymes is present in tissue fluids and in nearly all secretions except cerebrospinal fluid, sweat and urine. It act by splitting ceain polysaccharide components of the cell walls of susceptible bacteria . Reference : Anathanarayan & paniker's 9th edition, pg no:80 <\\p>", 'role': 'assistant'}]