In which of the following unpaired electron reside in unhybridised orbital?

The electrical structure of chlorine is known to $1s^{2}2s^{2}2p^{6}3s^{2}3p^5$ The hybridization process involves seven electrons in the outermost electron shell. $C{O}_2\mathit{ }O=C\dot{}=O$

Odd e- is delocahsed into Cl d-orbital in ClO_2.