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A _____________ dredger essentially consist of a graph suspended from cable.

(a) Hydraulic

(b) Grab

(c) Ladder

(d) Bucket

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Right option is (b) Grab

For explanation: A grab is in the shape of scooper like a quadrant of a circle. It opens in its normal position. On being lowered to the bottom, the grab digs into the mud and by suitable arrangement, the grab is closed.

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