The order that has the following acids correctly arranged with respect to increasing acidity is:

i < ii < iii

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i < iii < ii

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ii < iii < i

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ii < i < iii

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Solution

The correct option is B i < iii < ii
As $F$ is the most EN atom and highest EWG. IT is the strongest. $I$ is also an $E W G$ . Hence $(i i i)$ comes next and then $(i)$ with an only alkyl group.
So, the correct order is $i < i i i < i i$ .

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