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 Hodgkin lymphoma, B. Paroxysomal nocturnal hemoglobinurea, C. Rheumatoid ahritis, D. SLE', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Paroxysomal nocturnal hemoglobinurea Rituximab o Rituximab is a targeted antibody against cell surface molecule CD-20, i.e. Rituximab is anti CD-20 antibody. o It is used in : 1. B-cell lymphomas --> Low grade lymphomas, mantle cell lymphomas, relapsed aggressive B cell lymphomas, CLL 2. SLE Rheumatoid ahritis", 'role': 'assistant'}]