Select the correct passive form of the given sentence.
They called a plumber to replace the rusted pipes.

Options

A. A plumber is called to replace the rusted pipes.
B. A plumber was called to replace the rusted pipes
C. A plumber has called to replace the rusted pipes
D. A plumber will be called to replace the rusted pipes

Explanation

(b) A plumber was called to replace the rusted pipes. (Correct) (a) A plumber is called to replace the rusted pipes. (Tense has changed) (c) A plumber has called to replace the rusted pipes. (Tense has changed) (d) A plumber will be called to replace the rusted pipes. (Tense has changed)