Select the correct active form of the given sentence.

This unfair proposal is objected to by us.

We object to this unfair proposal.

The correct active form of the given sentence is We object to this unfair proposal.

The sentence "This unfair proposal is objected to by us" is in the passive voice. The passive voice is formed by putting the subject of the active sentence after the verb "to be" and the past participle of the main verb. In this case, the subject of the active sentence is "this unfair proposal" and the main verb is "object." The past participle of "object" is "objected." So, the passive form of the sentence is "This unfair proposal is objected to by us."

The active voice is formed by putting the subject of the passive sentence before the verb and the past participle of the main verb. In this case, the subject of the passive sentence is "we" and the main verb is "object." The past participle of "object" is "objected." So, the active form of the sentence is We object to this unfair proposal.

The other options are incorrect because:

• We are objecting this unfair proposal is in the present progressive tense, while the original sentence is in the simple present tense.
• We object this unfair proposal is grammatically incorrect. The verb "to object" is followed by a direct object, but the phrase "we object this unfair proposal" does not have a direct object.
• We have objected to this unfair proposal is in the present perfect tense, while the original sentence is in the simple present tense.