A Port had provisioned food for 150 men for 45 days. After 10 days, 25 men left the fort. The number of days for which the remaining food will last is:

Initially, food for 150 men for 45 days. After 10 days, food for 150 men for 35 days remains. With 25 men leaving, 125 men remain. The food will last for (150 * 35) / 125 = 42 days, making option C correct.