Chlorine gas is dried over

Consider the following statements about the oxides of halogens:
$A$. At room temperature, $OF_2$ is thermally stable.
$B$. Order of stability of oxides of halogens is $I > Br > Cl$.
$C$. $I_2O_5$ is used in the estimation of $CO$.
$D$. $ClO_2$ is used as a bleaching agent.
The correct statements are:

Which of the following molecules give oxyacid as well as hydra acid on hydrolysis at room temperature?

Which of the following interhalogen compounds is $NOT$ obtained by the action of fluorine with bromine? $(X=Br, X^{\prime}=F)$

Which of the following reactions does not form $PCl_3$ as one of the products?

$PbF_4$ and $PbCl_4$ exist,while $PbBr_4$ and $PbI_4$ do not. The reason for this is .......