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The order of stability of the following tautomeric compounds is:

1. III > II > I
2. II > I > III
3. II > III > I
4. I > II > III

Correct answer: II > III > I

Solution

The stability of tautomeric compounds depends on factors like hydrogen bonding, aromaticity, and resonance. Compound II is likely the most stable due to better resonance stabilization, followed by III, and then I.

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