Match Column $-I$ with Column $-II$ :

Column $-I$	Column $-II$
$(a)$. Super oxide	$(p)$. $Na_2O_2$
$(b)$. Peroxide	$(q)$. $CO_2$
$(c)$. Dioxide	$(r)$. $C_3O_2$
$(d)$. Sub oxide	$(s)$. $CsO_2$

(A) The correct matches are as follows:
$(a)$. Super oxide: $CsO_2$ (contains $O_2^-$ ion).
$(b)$. Peroxide: $Na_2O_2$ (contains $O_2^{2-}$ ion).
$(c)$. Dioxide: $CO_2$ (carbon dioxide).
$(d)$. Sub oxide: $C_3O_2$ (carbon suboxide).
Therefore,the correct sequence is $(a-s), (b-p), (c-q), (d-r)$.