For four sine waves, moving on a string along positive x direction, displacement-distance curves (y-x curves) are shown at time t = 0. In the right column, expressions for y as function of distance x and time t for sinusoidal waves are given. All terms in the equations have general meaning. Correctly match y-x curves with corresponding equations.

	Column – I		Column – II
A)		P)	$y=A\cos (\omega t-kx)$
B)		Q)	$y=-A\cos (\omega t-kx)$
C)		R)	$y=A\sin (\omega t-kx)$
D)		S)	$y=A\sin (kx-\omega t)$