In the following question, a sentence has been given in Active/Passive voice. Out of four alternatives suggested, select the one, which best expresses the same sentence in Passive/Active voice.
The seawater eventually corroded the pillars of the bridge.
1). Eventually the pillars of the bridge are being corroded by the seawater.
2). Eventually the pillars of the bridge have been corroded by the seawater.
3). The pillars of the bridge were eventually corroded by the seawater.
4). The pillars of the bridge have been eventually corroded by the seawater.