A ray of light ab passing through air enters a liquid of refractive index `mu_(1)` at the boundary XY. In the liquid, the ray is shown as bc. The angle between ab and bc ( angle of deviation) is `delta`. The ray then passes through a rectangular salb ABCD of refractive index `mu_(2)(mu_(2)gtmu_(1))` and emerges from the slab as the ray de. The angle between XY and AB is `theta`. The angle between ab and de is
A. `delta`
B. `delta+theta`
C. `delta+sin^(-1)((mu_(1))/(mu_(2)))`
D. `delta+theta-sin^(-1)((mu_(1))/(mu_(2)))`
