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': 'AB group has following agglutinins: \nSelect and explain. \nA. Anti - A & anti - B, B. Neither anti-A nor anti-B, C. Anti-A, D. Anti-B', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Blood Types with Their Genotypes and Their Constituent Agglutinogens and Agglutinins:', 'role': 'assistant'}]