[" Elements "A,B,C,D" and "E" have following electronic "],[" configurations: "],[[" (A) "1s^(2),2s^(2)2p^(1)," (B) "1s^(2),2s^(2)2p^(6),3s^(2)3p^(1)],[" (C) "1s^(2),2s^(2)2p^(6),3s^(2)3p^(3)," (D) "1s^(2),2s^(2)2p^(6),3s^(2)3p^(5)],[" (E) "1s^(2),2s^(2)2p^(6),3s^(2)3p^(6),],[" Which among the belongs to same group in the "],[" periodic table? "]],[[" (a) "A" and "C," (b) A and "D],[" (c) "A" and "E," (d) "A" and "B]]