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
Efavirenz is used for treatment of HIV infections. It acts 
Select and explain. 
A. As protease inhibitor, B. As reverse transcriptase inhibitor, C. As integrase inhibitor, D. By inhibiting the HIV entry into the cell
B: As reverse transcriptase inhibitor
Answer: B: As reverse transcriptase inhibitor 
Explanation: None