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Change the voice in the sentences given below by selecting the correct alternative: 

Q:

They have proved all his calculations wrong. 

  • 1
    All his calculations have been proved wrong.
  • 2
    All his calculations are proved wrong.
  • 3
    All his calculations are being proved wrong.
  • 4
    All his calculations had been proved wrong.
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Answer : 1. "All his calculations have been proved wrong. "

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