The correct decreasing order for acid strength is :

Question

NO₂CH₂COOH > FCH₂COOH > CNCH₂COOH > ClCH₂COOH

FCH₂COOH > NCCH₂COOH > NO₂CH₂COOH > ClCH₂COOH

CNCH₂COOH > O₂NCH₂COOH > FCH₂COOH > ClCH₂COOH

NO₂CH₂COOH > NCCH₂COOH > FCH₂COOH > ClCH₂COOH

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