$A$ catalyst is a substance which

Match the industrial process (Column-$I$) with the catalyst used (Column-$II$) and select the correct option.

Column-$I$	Column-$II$
$A$. Haber's process for ammonia	$P$. Zeolite
$B$. Oswald's process for $HNO_3$	$Q$. $Fe$
$C$. Contact process for $H_2SO_4$	$R$. $V_2O_5$
$D$. Cracking of hydrocarbons	$S$. $Pt$ gauge

In case of autocatalysis,

Iron $(III)$ catalyses the reaction between iodide and persulphate ions,in which
$A$. $Fe^{3+}$ oxidises the iodide ion
$B$. $Fe^{3+}$ oxidises the persulphate ion
$C$. $Fe^{2+}$ reduces the iodide ion
$D$. $Fe^{2+}$ reduces the persulphate ion
Choose the most appropriate answer from the options given below:

For the conversion of ozone to oxygen in the atmosphere,nitric oxide in the gaseous phase acts as:

Which of the following statements is $NOT$ correct?