Which of the following given compounds can exhibit tautomerism ?
A
I and II
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B
I , II and III
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C
I and III
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D
II and III
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Solution
The correct option is B I , II and III For a compound to exhibit tautomerism, presence of α-hydrogen is neccessary at its sp3 hybridised ⍺-C atom. All the three compounds I ,II and III can exhibit tautomerism.