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a
exhibits only inductive effect
b
exhibits only resonance effect
c
has more dominating resonance effect than inductive effect
d
has more dominating inductive effect than resonance effect
answer is C.
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Detailed Solution
i.e. OH group +mesomeric effect is stronger than inductive effectReason: 2p-orbital of oxygen and 2p orbital of Carbon sizes are same then maximum extent of overlapping takes place and hence +ME dominating than –IE of oxygen.