Assertion (A): A tangent to a circle is perpendicular to the radius through the point of contact

Assertion (A): A tangent to a circle is perpendicular to the radius through the point of contact.

Reason (R): The lengths of tangents drawn from an external point to a circle are equal.

B. Both Assertion (A) and Reason (R) are true but Reason (R) does not give the correct explanation of Assertion (A).