**Question:**

A"By whom was Mathematics taught ?"

B"By whom is being Mathematics taught ?"

C"By whom Mathematics is being taught ?"

D"By whom is Mathematics taught ?"

**Answer: **

Who ൽ തുടങ്ങുന്ന Questionനെ Passive Voice ൽ ആക്കുന്ന വിധം : Who ന് ശേഷം V1 / Verb + s,es /do/does വന്നാൽ : Passive form : By whom + is/am/are + object + V3 . By whom + is + mathematics + taught .