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: Pathology
[{'content': 'Which of the following is true regarding major basic protein? \nSelect and explain. \nA. Formed by Eosinophils, B. Cytotoxic to parasites, C. Not very effective against bacteria, D. All the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Major basic protein is toxic cationic protein that is the principal protein found in the granules of eosinophils and that is capable of damaging tissue. Its main function is to bind to and kill larvae of helminthic worms. Other proteins secreted by eosinophils are eosinophil cationic protein, eosinophil peroxidase, and an eosinophil-derived neurotoxin. All of these proteins have anti-bacterial and anti-worm propeies.', 'role': 'assistant'}]