Final answer:
HAART stands for highly active antiretroviral therapy and it involves a combination of different drugs to treat HIV infection. The minimum number of drugs required for HAART is 3 drugs option (B).
Step-by-step explanation:
HAART stands for highly active antiretroviral therapy and it is used in the treatment of HIV infection. HAART involves a combination of different drugs, sometimes called a drug "cocktail", which attack the virus at different stages of its replicative cycle. This makes it more difficult for the virus to develop resistance to multiple drugs at the same time. The minimum number of drugs required for HAART is (B) 3 drugs.