This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunodeficiency Disorders, Subject name: Pathology
[{'content': "Most common malignancy in AIDS: \nSelect and explain. \nA. Kaposi sarcoma, B. B cell lymphoma, C. Leukemia of myeloid origin, D. Burkitt's lymphoma", 'role': 'user'}, {'content': 'Answer: A \nExplanation: AIDS-defining malignancies: Kaposi sarcoma (m/c) B- cell Lymphoma Cervical cancer in women / Anal cancer in women', 'role': 'assistant'}]