`10 gm` of ice at `-20^(@)C` is dropped into a calorimeter containing `10 gm` of water at `10^(@)C`, the specific heat of water is twice that of ice. When equilibrium is reached the calorimeter will contain:
A. 20 gm of water
B. 20 gm of ice
C. 10 gm ice and 10 gm water
D. 5 gm ice and 15 gm water