$PCl_3$ and $PCl_5$ both exist; $NCl_3$ exists but $NCl_5$ does not exist. It is due to :

Question

( A ) availability of vacant d-orbital in $P$ but not in $N$
( B ) lower electronegativity of $P$ than $N$
( C ) statement is itself incorrect
( D ) lower tendency of N to form covalent bond