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': 'T helper cells recognises - \nSelect and explain. \nA. MHC class I, B. MHC class II, C. Processed peptides, D. Surface Ig', 'role': 'user'}, {'content': 'Answer: B \nExplanation: CD4+ T cells have TCRs with an affinity for Class II MHC Ref: Ananthanarayanan & Panikers textbook of microbiology 9th edition pg: 135', 'role': 'assistant'}]