Select the correct active voice form of the given sentence.

All the inmates were rescued from the building by the firemen.

The firemen rescued all the inmates from the building.

The correct active voice form of the given sentence "All the inmates were rescued from the building by the firemen" is The firemen rescued all the inmates from the building.

The passive voice of the sentence is "All the inmates were rescued from the building by the firemen." This sentence is in the past tense, which is used to describe an action that happened in the past. The passive voice of the sentence 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 "inmates" and the main verb is "rescue." The past participle of "rescue" is "rescued." So, the passive form of the sentence is "All the inmates were rescued from the building by the firemen."

The active voice of the sentence is formed by putting the subject of the passive sentence before the verb and removing the word "by." In this case, the subject of the passive sentence is "firemen" and the verb is "rescue." So, the active form of the sentence is "The firemen rescued all the inmates from the building."

The other options are incorrect because:

• The firemen are rescuing all the inmates from the building. This sentence is in the present progressive tense, which is used to describe an action that is happening now but is not finished.
• The firemen have been rescuing all the inmates from the building. This sentence is in the present perfect tense, which is used to describe an action that happened in the past and is still relevant to the present.
• The firemen have rescued all the inmates from the building. This sentence is also in the present perfect tense, but it implies that the firemen have rescued the inmates multiple times.