This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Infection, Subject name: Medicine
[{'content': 'Ibalizumab was approved by FDA in 2018 April for \nSelect and explain. \nA. HIV, B. TB, C. Leprosy, D. Malaria', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ibalizumab was approved for HIV in 2018 Ibalizumab belongs to a new class of HIV drugs called post-attachment inhibitors. Post-attachment inhibitors work by attaching to the CD4 receptor on the surface of the immune cells. When ibalizumab attaches to the CD4 receptor, HIV cannot attach to, enter, or infect the cell. Ref - Harrisons 203 pg 1457 , pubmed.com', 'role': 'assistant'}]