A stone tied to the end of a string of 1 m long is whirled in a horizontal circle with a constant speed. If the stone makes 22 revolutions in 44 s, what is the magnitude and direction of acceleration of the stone ?
(A) m s and direction along the radius towards the centre
(B) m s and direction along the radius away from centre
(C) m s and direction along the radius towards the centreCorrect
(D) m s and direction along the tangent to the circle