The correct option is C A heavy loaded truck is measured in tons.
⇒Ounce, pound and ton all of them are units for measuring weight.
→Ounce is used to measure very light weights like gold and dry fruits.
→Pound is used to measure weights like weight of human body, weight of vegetables bought.
→Ton is a unit of weight used in measuring heavy weights like loaded truck. Heavy metal etc.
Hence, option D is incorrect rest options A, B and C are correct.