Consider the molecule below and answer the question for the numbered atom cited. Please note that lone pairs have been omitted for simplicity, but all atoms except hydrogen obey the octet rule.

What is the hybridization of the carbon atom marked as #$3$ on the diagram?

$sp$

$s{p}^2$

$s{p}^3$

$d^{2}s{p}^3$

$s^2{p}^2$