The metal oxide which can react with acid as well as alkali is:

The correct option is C aluminium oxide
An amphoteric oxide is an oxide that can act either as an acid or base in a reaction.
$A{l}_2{O}_3$ is an amphoteric oxide. When reacted with HCl, it acts as a base to form the salt $AlC{l}_3$. When reacted with NaOH, it acts as an acid to form $NaAl{O}_2$.