Change from Passive to Active voice:
His hair is being cut by a professional

Correct option is B

Option b is the correct active form of the given passive sentence.
· Passive Voice: The original is in passive voice with the subject "his hair" receiving the action performed by "a professional."
· Active Voice: The active voice places the doer of the action at the forefront.
· Rule for converting from passive to active voice: Object + auxiliary verb ('is being') + past participle ('cut') + by + subject -> Subject ('A professional') + present continuous verb ('is cutting') + object ('his hair').
· "A professional is cutting his hair" shifts focus onto the doer, making "a professional" the subject who actively performs the cutting, aligning perfectly with active voice rules and present continuous tense.