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 following figure, a circle is inscribed in a quadrilateral
\(ABCD\), touching all its sides., as shown. Then \(AB + BC = AD + DC\).
Reason (R) : For two concentric circles, the chord of the outer circle that touches the smaller circle is bisected at the point of contact.