This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immune system, Subject name: Medicine
[{'content': 'Immunoglobulins used in Rx of \nSelect and explain. \nA. Myasthenia gravis, B. Malaria, C. PAN, D. Hemophilia', 'role': 'user'}, {'content': 'Answer: A \nExplanation: IMMUNOLOGICAL TREATMENT OF MYASTHENIA GRAVIS Ref - Davidsons 23e p1142', 'role': 'assistant'}]