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A shipping clerk has five boxes of different but unknown weights each weighing less than 100 kg. sThe clek weighs the boxes in pairs. The weights obtained are 110, 112, 113 , 114 , 115,116,117,118,120 and 121 kg . What is the weight of the heaviest box?

A. 60 kg
B. 62 kg
C. 64 kg
D. Cannot be determined
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সঠিক উত্তরঃ D. Cannot be determined
Explanation: