A ray of light passes from a medium A having refractive index 1.6 to the medium B having refractive index 1.5. the value of critical angle of medium A is _______

Options

A. `sin^-1 (frac(16)(15))`
B. `sin^-1 (sqrtfrac(16)(15))`
C. `sin^-1 (frac(1)(2))`
D. `sin^-1 (frac(15)(16))`