Is Cu2+ or Cu+ more stable in water?

1. A.
   Both (A) and (R) are correct and (R) is the correct explanation of (A)
2. B.
   (A) is not correct but $(R)$ is correct
3. C.
   (A) is correct but $(R)$ is not correct
4. D.
   Both (A) and (R) are correct but (R) is not the correct explanation of (A)

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1. A.
   $Cu$ (II) is less stable
2. B.
   Stability of $Cu(I)$ and $Cu$ (II) depends on nature of copper salts
3. C.
   $Cu$ (II) is more stable
4. D.
   $Cu(I)$ and $Cu(II)$ are equally stable

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