Question:
A"By whom is this done ?"
B"By whom was this done ?"
C"By whom is this being done ?"
D"By whom has this done ?"
Answer:
Who ൽ തുടങ്ങുന്ന Questionനെ Passive Voice ൽ ആക്കുന്ന വിധം : Who ന് ശേഷം V2/did വന്നാൽ : Passive form : By whom + was/were + object + V3 . By whom + was + this + done .
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