This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Kidney, Subject name: Medicine
[{'content': 'Radiotherapy is treatment of choice in- \nSelect and explain. \nA. Sarcoidosis, B. Tuberculosis, C. Monoclonal hypogammaglobulinemia, D. Sarcomas', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Hypergammaglobulinemia results from an overproduction of immunoglobulins by plasma cells, either monoclonal and reflective of a plasma cell or lymphoproliferative disorder, or polyclonal and accompanying other disease states. IgG replacement therapy and theradiotheraphy aretreatment of choice for most primary immunodeficiency syndromes, including X-linked agammaglobulinemia (Bruton disease; XLA), common variable immunodeficiency (CVID), severe combined immunodeficiency (SCID), hyper-IgM, adenosine deaminase (ADA) deficiency, and Wiskott-Aldrich syndrome Ref Harrison20th edition pg 298', 'role': 'assistant'}]