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': 'Ipilimumab is a \nSelect and explain. \nA. Anti CD30 Monoclonal Antibody, B. PDL1 receptor inhibitor, C. CTLA4 inhibitor, D. PTPN22 inhibitor', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ipilimumab and Tremelimumab are CTLA4 inhibitors used in BRAF -ve malignant melanoma.', 'role': 'assistant'}]