Which m-pchlorobenzaldehyde is treated with `50% KOH` solution, the product (s) obtained is (are)

Which m-pchlorobenzaldehyde is treated with `50% KOH` solution, the product (s) obtained is (are)

Which m-pchlorobenzaldehyde is treated with `50% KOH` solution, the product (s) obtained is (are)