Select the correct statement about ${\mathrm{ClO}}_3$.

 The correct statement about ${\mathrm{ClO}}_3$ are-

${\mathrm{ClO}}_3$ has an unpaired electron.

${\mathrm{ClO}}_3$ has pyramidal structure

In ${\mathrm{ClO}}_3$, Cl atom is ${\mathrm{sp}}^3$ hybridised.

Hence, the correct option is A, B, C.