I known that he did the work– বাক্যটির সঠিক পরিবর্তিত voice কী হবে?

• ক It is known to me that the work was done by him
• খ It was known to me that the work had been done by him
• গ It was known to me that the work has been done by him
• ঘ It was known to me that the work was done by him ✅ সঠিক উত্তর