In YDSE, having slits of equal width, let `beta` be the fringe width and `I_(0)` be the maximum intensity. At a distance x from the central brigth fringe, the intensity will be
A. `I_(0)cos(x/(beta))`
B. `I_(0)cos^(2)(x/(beta))`
C. `I_(0)cos^(2)((pix)/(beta))`
D. `((I_(0))/4)cos^(2)((pix)/(beta))`