The correct options are
A H2PO4>H3PO3>H3PO2 (reducing character)
C SbH3>NH3>AsH3>PH3 (reducing character)
H3PO4>H3PO3>H3PO2 (oxidising character)
+5 +3 +1
N2O<NO<N2O5 (oxidation state on nitrogen atom)
+1 +2 +5
NH3>PH3>AsH3>SbH3 (basicity)
because as we move down the group, basecity increases.
SbH3>NH3>AsH3>PH3 (oxidising character)