Assertion: `NBS` is a specific reagent for allylic bromination
Reason: Allylic bromination oC Curs through free radical intermediates .
A. If both assertion and reason are true and the reasone is the correct explanation of the assertion .
B. If both assertion and reason are true but reason is the correct explanation of the assertion .
C. If assertion is true but reasone is false
D. If assertion is false but reason is true .