Asseration: Nitrogen forms `H_(2)N-NH_(2),N_(2)` and `N_(3)^(-)` ions whereas phosphorus form `P_(4)` molecule.
Reason: Nitrogen can form of three `N-`atoms only, `P` has four catenated atoms.
A. If both asseration and reson are true and the reason is the correct explanation of the asseration.
B. If both asseration and reason are true ans the reason is the correct explanation of the asseration.
C. If asseration is true but reason is false.
D. If asseration is false but reason is true.