Which of the following halogen oxides is used for the estimation of carbon monoxide in automobile exhaust gases?

On boiling an aqueous solution of $KClO_3$ with iodine,the following product is obtained:

$A$ greenish-yellow gas reacts with an alkali metal hydroxide to form a halate which can be used in fireworks and safety matches. The gas and halate are,respectively:

When $Cl_2$ is passed through cold dil. $NaOH$,the products are:

The correct order of bond dissociation enthalpy of halogens is:

Which of the following halide ions can be oxidized by nitric acid?