A refrigerator converts 100 g of water at 25∘C into ice at −10∘C in one hour and 50 minutes. The quantity of heat removed per minute is: (Specific heat of ice = 0.5 cal/g∘C, latent heat of fusion = 80 cal/g)
(a) 50 cal
(b) 100 cal
(c) 200 cal
(d) 75 cal