The correct answer is: B. He has been granted a scholarship by the Principal.
The other options are incorrect because they do not use the passive voice correctly. The passive voice is used when the focus of the sentence is on the action, rather than the person or thing doing the action. In this case, the focus is on the fact that the principal has granted the scholarship, not on the principal himself.
Option A: A scholarship has granted to him by the principal.
This sentence is in the passive voice, but it is not grammatically correct. The verb “grant” should be followed by the preposition “to,” not “by.”
Option C: He has granted a scholarship by the Principal.
This sentence is in the active voice, but it is not grammatically correct. The verb “grant” should be followed by the direct object, which is “a scholarship,” not the subject, which is “he.”
Option D: A scholarship was granted to him by the principal.
This sentence is in the passive voice and is grammatically correct. However, it is not as concise as option B.