Assertion : Elementary phosphorus exists in three principal allotropic forms, i.e., white (yellow), red (or violet) and black.
Reason : Of the three forms, white phosphorus is the most important and most reactive.

Options

A. If both Assertion and Reason are correct and Reason is the correct explanation of Assertion
B. If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion
C. If Assertion is correct , but Reason is incorrect
D. If both Assertion and Reason are incorrect

Answer

B

Explanation

Depending upon whether `P_4` molecules exist as discrete molecules held together by weak van der waals forces or are covalently bonded with one another to form polymeric structures, phosphorus exists in three allotropic forms.