MCQ
Which of the following can show $+M$ or $+R$ effect
- A$-COCH_3$
- B$-CH_3$
- ✓$-NH_2$
- D$-COOH$
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$(A)$ The compound is optically active
$(B)$ The compound possesses centre of symmetry
$(C)$ The compound possesses plane of symmetry
$(D)$ The compound possesses axis of symmetry