The weights of 4 boxes are 30, 20, 60 and 70 kilograms. Whic

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The weights of 4 boxes are 30, 20, 60 and 70 kilograms. Which of the following cannot be the total weight,in kilograms, of any combination of these boxes and in a combination a box can be used only once?

[2017 SSC CGL 19 Aug Shift-3]

A 180

B 150

C 120

D 170