The Hybridization of carbon in carbon sub oxide  is

Each carbon atom in carbon suboxide (C3​O2​) is sp - hybridized. If carbon is bonded with a double bond from both sides, then the carbon is said to have undergone sp hybridization.The structure is O=C=C=C=O.                                    sp    sp     spall bonds are single or sigma, the hybridization is sp3all bonds are single and one pie or positive, the hybridization is sp2all bonds are single and two pie , the hybridization is sp