A rod AB carries three loads of 30 N, 70 N and 100 N at distances of 20 mm, 90 mm and 150 mm respectively from A. Neglecting the weight of the rod, the point at which the rod will balance is_______________?

A. 119.5 mm from A

B. 109.5 mm from A

C. 132.5 mm from A

D. 125.5 mm from A

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