Explanation

1 hectare-centimeter (ha cm) of water equals 10,000 cubic meters. Since 1 cubic meter of water is approximately 1 tonne, this equals 10,000 tonnes. Also, 1 cubic meter equals 1,000 liters, so 10,000 cubic meters equals 10,000,000 liters (10 million liters). However, in agricultural contexts, 1 ha cm is often approximated as 100 tonnes (since 10,000 m² * 0.01 m = 100 m³, which is 100 tonnes) and 100,000 liters (since 100 m³ = 100,000 liters). Thus, both A and B are commonly accepted approximations in this specific exam context.