MCQ
- A$\text{CH}\equiv\text{CH}$
- B$\text{CH}_3-\text{C}\equiv\text{CH}$
- C$\text{CH}_3-\text{CH}_3$
- D$\text{CH}\equiv\text{C}-\text{NH}_2$
Explanation:

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The observed pattern of electrophilic substitution can be explained by
$(A)$ the steric effect of the halogen
$(B)$ the steric effect of the tert-butyl group
$(C)$ the electronic effect of the phenolic group
$(D)$ the electronic effect of the tert-butyl group