Half of the villagers of a certain village have their own houses. One-fifth of the villagers cultivate paddy. One-third of the villagers are literate. Four-fifth of the villagers is below twenty-five. Then which one of the following is certainly true?

• A. All the villagers who have their own houses are literate.
• B. Some villagers under twenty five are ilterate.
• C. A quarter of the villagers who have their own houses cultivate paddy.
• D. Half of the villagers who cultivate paddy are literate.