KeerthanaPosted on Directions(Q.18 to Q.21 ): Which of the following elements should come in a place ’?’ ? AB3 CE6 FI10 JN15 ? a OT20 b TO21 c OT21 d TS21 e None of these Answer : Option CExplanation : OT21 Rate This:NaN / 5 - 1 votesAdd comment