Which of the following is a neutral oxide?

Match the reactions (in the given stoichiometry of the reactants) in List-$I$ with one of their products given in List-$II$ and choose the correct option.

List-$I$	List-$II$
$A. P_2 O_3 + 3 H_2 O \rightarrow$	$1. P(O)(OCH_3)Cl_2$
$B. P_4 + 3 NaOH + 3 H_2 O \rightarrow$	$2. H_3 PO_3$
$C. PCl_5 + CH_3 COOH \rightarrow$	$3. PH_3$
$D. H_3 PO_2 + 2 H_2 O + 4 AgNO_3 \rightarrow$	$4. CH_3 COCl$
	$5. H_3 PO_4$

$A$ metal $(X)$ dissolves in both dilute $HCl$ and dilute $NaOH$ to liberate $H_2$ gas. Addition of $NH_4Cl$ and excess $NH_4OH$ to an $HCl$ solution of $(X)$ produces $(Y)$ as a precipitate. $(Y)$ is also produced by adding $NH_4Cl$ to the $NaOH$ solution of $(X)$. The species $(X)$ and $(Y)$,respectively,are:

Which element does not form complexes?

When ammonium dichromate is heated,the gas formed is

Identify the false statement about red phosphorus.