Assertion: Although $\text{PF}_5, \text{PCl}$ and $\text{PBr}_5$ are known, the pentahalides of nitrogen have not been observed
Reason: Phosphorus has a lower electronegativity than nitrogen.
(A) Both ASSERTION and REASON are CORRECT, and the REASON is the CORRECT explanation for the ASSERTION
(B) Both ASSERTION and REASON are CORRECT, BUT the REASON is NOT the CORRECT explanation for the ASSERTION
(C) The ASSERTION is CORRECT, but NOT the REASON
(D) The ASSERTION is INCORRECT, but the REASON is CORRECT
