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
[{'content': 'The interaction of antigens with antibodies on the surface of a mast cell leads to degranulation and anaphylaxis. The mast cell granules produce anaphylaxis because they contain: \nSelect and explain. \nA. Lysosomes, B. Proteolytic enzymes, C. Lymphotoxins, D. Vasoactive mediators', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]