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Answer : 4 2.6 g of solute in 2 ml of solution Explanation : Answer: D) 2.6 g of solute in 2 ml of solution Explanation: A concentrated solution will contain the most solute molecules per solvent molecules.Here in the given options,1)  6/10 = 0.62) 20.5/50 = 0.413) 30/120 = 0.254) 2.6/2 = 1.3 Hence, option D) is most concentrated.

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