Fehling’s solution is

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Magenta solution in H₂SO₃

Alkaline CuSO₄ complexed with citrate ions

Alkaline CuSO₄ + Rochelle salt (Sod. pot. tartrate)

Ammonical AgNO₃ solution

answer is A.

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Detailed Solution

Fehling's A is a solution containing copper(II) sulphate, which is blue color. Fehling's B is a clear liquid consisting of potassium sodium tartrate (Rochelle salt) and a strong alkali like NaOH,KOH.,Etc, usually sodium hydroxide. During the test solutions A and B are prepared individually and stored. Just before the test they are mixed.

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