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Which of the following comlpounds will show the maximum 'enol' content ?

1. CH 3 COCH 3
2. CH 3 COCH 2 COOC 2 H 5
3. CH 3 COCH 2 COCH 3
4. CH 3 COCH 2 CONH 2

Correct answer: CH 3 COCH 2 COCH 3

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