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': 'Variable poion of antibody molecule is - \nSelect and explain. \nA. C-terminal, B. N-terminal, C. Intermediate region, D. Carbohydrate moiety', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Question repeated', 'role': 'assistant'}]