This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Skin
All are asociated with pemphigus except: 
Select and explain. 
A. Thymoma, B. CLL, C. Myasthenia gravis, D. Atrophic gastritis
D: Atrophic gastritis
Answer: D: Atrophic gastritis 
Explanation: Di.e. Atropine gastritis Paraneoplastic pemphigus may be associated with non Hodgkin's lymphomaQ (NHL), Chronic lymphocytic leukemiaQ (CLL), Castleman's disease, thymomaQ and spindle cell tumors. And pemphigus folliaceus is associated with thymoma & /or mysthenia gravisQ.