Problem

Match the statement of Column I with values of Column II.

Column-I	Column-II
(A) The number of real roots of the equation $\cos^7 x + \sin^4 x = 1$ in $(-\pi, \pi)$ is	(p) 1
(B) The value of $\sqrt{3} \csc 20^\circ - \sec 20^\circ$ is	(q) 4
(C) $4 \cos 36^\circ - 4 \cos 72^\circ + 4 \sin 18^\circ \cos 36^\circ$ equals	(r) 3
(D) The number of values of $x$ where $x \in [-2\pi, 2\pi]$ , which satisfy $\csc x = 1 + \cot x$	(s) 2