Which of the following statement(s) is/are correct?

(1) O3 is a bent molecule, option A is correct. Ozone (O3) has a bent molecular geometry with a bond angle of approximately 117°. This bent shape arises from the presence of one lone pair of electrons on the central oxygen atom and two bonding pairs. The bent shape results in a dipole moment, making ozone a polar molecule. Option B is also correct. Ozone is diamagnetic because all of its electrons are paired. Option C is correct. ONCl and ONO⁻ are isoelectronic because both have the same number of valence electrons. Hence option D is incorrect.