2kg of ice at $-{20}^{\circ }\mathrm{C}$ is mixed with 5kg of water at 20^o C . The water content of final mixture is (Latent heat of ice = 80 kcal/kg, specific heat of water $=1\mathrm{k} \mathrm{cal} {{\mathrm{kg}}^{-1}}^{\circ }{\mathrm{C}}^{-1}$specific heat of ice $=0.5\mathrm{k} \mathrm{cal} {{\mathrm{kg}}^{-1}}^{\circ }{\mathrm{C}}^{-1}$)

• A

  7 kg

• B

  6 kg

• C

  4 kg

• D

  3 kg