This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Haematology, Subject name: Pathology
Not a B cell lymphoma - 
Select and explain. 
A. Mycosis fungoides, B. CLL, C. Hairy cell leukemia, D. Mantle cell lymphoma
A: Mycosis fungoides
Answer: A: Mycosis fungoides 
Explanation: Mycosis fungoides is a slowly evolving cutaneous T-cell lymphoma occuring in middle aged adult males Ref: Harshmohan textbook of pathology pg:359