Voice
In the following question, a sentence has been given in Active/Passive Voice. Out of the four/five alternatives suggested, select the one which best expresses the same sentence in Passive/Active Voice. I don't know his whereabouts.

His whereabouts is not known by me.
No one knows his whereabouts.
His whereabouts had not been known to me.
His whereabouts are not known to me.

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Voice
Deforestation has reduced rainfall in the tropical lands.

Reduced rainfall deforested.
Tropical lands have been reduced by rainfall.
Rainfall has been reduced in the tropical lands due to deforestation.
Rainfall has been reduced and caused deforestation.

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Voice
The peon refused him admittance.

Admittance is refused him by the peon.
He was refused admittance by the peon.
Admittance is refused to him by the peon.
Admittance was refused by the peon to him.

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