The x-z plane separates two media A and B of refractive indices `mu_(1) = 1.5` and `mu_(2) = 2`. A ray of light travels from A to B. Its directions in the two media are given by unit vectors `u_(1) = a hat(i)+b hat(j)` and `u_(2) = c hat(i) +a hat(j)`. Then
A. `(a)/(c) = (4)/(3)`
B. `(a)/(c) = (3)/(4)`
C. `(b)/(c) = (4)/(3)`
D. `(b)/(d) = (3)/(4)`