Which of the following has maximum iron content?

Match the extraction processes listed in Column $I$ with metals listed in Column $II$:

Column $I$	Column $II$
$A$. Self reduction	$P$. Lead
$B$. Carbon reduction	$Q$. Silver
$C$. Complex formation and displacement by metal	$R$. Copper
$D$. Decomposition of iodide	$S$. Boron

Mark the wrong statement.

The reaction for obtaining the metal $(M)$ from its oxide $(M_{2}O_{3})$ ore is given by
$M_{2}O_{3(s)} + 2 Al(\ell) \xrightarrow{\text{Heat}} Al_{2}O_{3}(\ell) + 2 M_{(s)}$, $(s = \text{solid}, \ell = \text{liquid})$
In this case, $M$ is

Which among the following is used as flux in the extraction of iron from oxide ores?

Describe the reaction occurring in the blast furnace at the lower temperature range.