Which of the following oxides will not act as a reducing agent?

What are the number of $P - O - P$ bridges in phosphorus pentoxide $(P_4O_{10})$ and phosphorus trioxide $(P_4O_6)$ respectively?

Each of the following is true for white and red phosphorus except that they

$PbO_2$ is obtained from

Given below are two statements: one is labelled as Assertion $(A)$ and the other is labelled as Reason $(R)$.
Assertion $(A)$ : $PH_3$ has lower boiling point than $NH_3$.
Reason $(R)$ : In liquid state $NH_3$ molecules are associated through van der Waals forces,but $PH_3$ molecules are associated through hydrogen bonding.
In the light of the above statements,choose the most appropriate answer from the options given below:

In the following reaction,identify the nature of the product formed by the complete hydrolysis of the underlined atom at $R.T.$:
$\underline{P}Cl_5 + H_2O \longrightarrow H_3PO_4 + HCl$