Based on the compounds of group 15 elements, the correct...

$( A )$ $B{i}_{2}{O}_{5}$ is metallic oxide but ${N}_{2}{O}_{5}$ is non metallic oxide therefore $B{i}_{2}{O}_{5}$ is basic but ${N}_{2}{O}_{5}$ is acidic.
$( B )$ In $N{F}_{3}, NandF$ are non metals but $Bi{F}_{3}, Bi$ is metal but $F$ is non metal therefore $N{F}_{3}$ is more covalent than $Bi{F}_{3}$
$( C )$ In $P{H}_{3}$ hydrogen bonding is absent but in $N{H}_{3}$ hydrogen bonding is present therefore $P{H}_{3}$ boils at lower temperature than $N{H}_{3}$
$( D )$ Due to small size in N-N single bond l.p. - l.p. repulsion is more than P-P single bond therefore N-N single bond is weaker than the P-P single bond