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: Medicine
[{'content': 'Which of the following represent Fetal Haemoglobin (HBF) \nSelect and explain. \nA. Alpha 2 Beta2, B. Alpha 2 Gamma 2, C. Alpha 2 delta 2, D. Delta 4', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Answer- B. Alpha 2 Gamma 2Alpha 2 Gamma 2- < 2% of Total adult HB', 'role': 'assistant'}]