The refractive index of water, glass and diamond are `1.33`, `1.50`, `2.40` respectively. The refractive index of diamond relative to water and of glass relative of diamond, respectively are nearly
A. `1.80`, `0.625`
B. `0.554`, `0.625`
C. `1.80`, `1.6`
D. `0.554`, `1.6`