Oxoacids of the halogens: number and structure

1. A.
   3,1 and 1
2. B.
   4,1 and 0
3. C.
   1,1 and 3
4. D.
   1,2 and 3

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

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