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': 'Which is concerned with HUMORAL immunity \nSelect and explain. \nA. B cell, B. T cell, C. Basophil, D. Monocytes', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]