In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Choose the correct option:
Assertion (A) : In the given figure, a quadrilateral \(ABCD\) is drawn to circumscribe a given circle, as shown. Then \(AB + BC = AD + DC\).

Reason (R) : In two concentric circles, the chord of the larger circle, which touches the smaller circle, is bisected at the point of contact.