(A) : The acidic strength of H–O–X decreases from X = Cl to X = I.
(R) : The electronegativity decreases from chlorine to iodine.

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A is false but R is true

A is true but R is false

Both A and R are true and R is the correct explanation

Both A and R are true but R is not the correct explanation of A

answer is A.

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Detailed Solution

When the electronegativity is more, the tendency to attract electron is more and it results in weaker O-H bond. Thus, it is easy to remove the H atom and hence acidic strength of oxoacid is more.

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