The coefficient of real expansion of liquid is `gamma_(R)` and the coefficient of appareent expansion of the liquid is `gamma_(A)`. The coefficient of cubical expansion of the vessel is `gamma`. If `gamma_(R) : gamma_(A) = 4:1` then `gamma_(A) : gamma` is
A. `3 : 1`
B. `1 : 3`
C. `4 : 1`
D. `1 : 4`