A ray of light enters a spherical drop of water of refractive index `mu` as shown in figure.
Q. Considert eh figure of question 60, the angle `phi` for which minimum deviation is produced will be given by
A. `cos^(2)phi=(mu^(2)+1)/(3)`
B. `cos^(2)phi=(mu^(2)-1)/(3)`
C. `sin^(2)phi=(mu^(2)+1)/(3)`
D. `sin^(2)phi=(mu^(2)-1)/(3)`