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': 'Diagnosis of X linked agammaglobulinemia should be suspected if - \nSelect and explain. \nA. Absent tonsils and no palpable lymph nodes on physical examination, B. Female Sex, C. High Isohernagglutinins titers, D. Low CD3', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]