ChemistryHard113×since 2002Q2137Which one of the following constitutes a group of the isoelectronic species?AC22−C_2^{2 - }C22−, O2−O_2^{-}O2−, CO, NOBNO+NO^{+}NO+, C22−C_2^{2 - }C22−, CN⁻, N2N_2N2CCN⁻, N2N_2N2, O22−O_2^{2-}O22−, C22−C_2^{2 - }C22−DN2N_2N2, O2−O_2^{-}O2−, NO+NO^{+}NO+, COCheck answerSkip