Choose the correct option to change the given sentence from the Active to the Passive Voice.

My grandfather built this home in 1930.

This home was built in 1930 by my grandfather.

The correct option is Option 4 : This home was built in 1930 by my grandfather.

The sentence is in the past tense, so the passive voice form of the verb "build" is "was built". The object of the sentence is "this home", and the subject is "my grandfather". Therefore, the correct sentence is "this home was built in 1930 by my grandfather".