This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pathology
[{'content': "The most common malignancy that produces ichthyosis? \nSelect and explain. \nA. Hodgkin's disease, B. Mycosis fungoides, C. Kaposi's sarcoma, D. Carcinoma breast", 'role': 'user'}, {'content': 'Answer: A \nExplanation: .', 'role': 'assistant'}]