Given:
The given expression is
We need to determine the factor of the given expression.
Factor:
Let us rewrite the given expression.
Thus, we have;
Since, the above expression is of the form , let us apply the identity
Thus, we have;
------ (1)
Now, we shall factor the term
Substituting the above expression in equation (1), we have;
Therefore, the factor of the given expression is
Hence, Option B is the correct answer.