Match the observed principal absoprtions in the visible spectrum shown List-I with the bond show this absorp tion in List - II List - I List - II (1) $\sigma \rightarrow \sigma^{*}$ (i) C - C (2) $n \rightarrow \sigma^{*}$ (ii) $\mathrm{C}-\mathrm{O}$ (3) $n, \pi^{*}$ (iii) $\mathrm{C}=\mathrm{O}$ (4) $\pi, \pi^{*}$ (iv) $\mathrm{C}=\mathrm{C}$