Q. A, B, C and D are points on the circumference of a circle. ABD is an equilateral triangle and AC is the diameter of the circle. Find the ratio of the perimeter of ABCD and the length of AC.

A. \(1+\frac\)

B. \(\frac+\sqrt[2]\)

C. \(1+\sqrt[2]\)

D. \(2+\sqrt[2]\)

C. 1+\(\sqrt[2]\)