Select the correct active form of the given sentence.
AIDS will have been cured by the year 2070 by scientists.

Correct option is A

The given sentence "AIDS will have been cured by the year 2070 by scientists" is in the future perfect passive voice.
In this form of the sentence, the subject (AIDS) receives the action of the verb (will have been cured) and is acted upon by an agent (scientists).
To convert it to active voice, we need to make the subject (scientists) the doer of the action and place it before the verb.
The new sentence becomes "Scientists will have cured AIDS by the year 2070," which is in the future perfect active voice.