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: Pharmacology
[{'content': 'Rituximab is used in all EXCEPT : \nSelect and explain. \nA. Non Hodgkins lymphoma, B. Paroxysomal nocturnal hemoglobinurea, C. Rheumatoid arthritis, D. Systemic lupus erythematosis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]