Multiple choice

Directions: Choose the correct passive form of the given sentence.

Who invented this ball pen?

  1. By whom was this ball pen invented.

  2. By whom was this ball pen invented?

  3. By whom was being this ball pen invented.

  4. By whom has this ball pen invented?

  5. Both (1) and (2)
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This is correct voice. For who, 'by whom' is used in passive voice.

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