Which among the following pairs of electronic effect and it's example is NOT correct?

Which among the following pairs of electronic effect and it's example is NOT correct?
  1. Hyper conjugation: Propene
  2. Resonance: Nitromethane
  3. (-) R effect: $\mathrm{C}_6 \mathrm{H}_5 \mathrm{NH}_2$
  4. Electrometric effect: Acetone

Solution

In $\mathrm{C}_6 \mathrm{H}_5 \mathrm{NH}_2, \mathrm{NH}_2$ is work as $+\mathrm{R}$ effect. So given in option $\mathrm{C}$ is wrong.

Asked in: MHT CET 2021 (24 Sep Shift 2)

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