2kg ice at -20° C is mixed with 5kg water at 20° C. Then final amout of water in the mixture would be
Given specific heat of ice = 0.5 cal/g° C
Specific heat of water = 1 cal/g° C
Latent heat of fusion for ice = 80 cal/g

A. 6 kg
B. 5 kg
C. 4 kg
D. 2 kg