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: Physiology
[{'content': 'Small lymphocyte is: \nSelect and explain. \nA. Bigger than RBC, B. Same as the size of RBC, C. Smaller than RBC, D. None of these', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]