MCQ
Arrange the above in the decreasing order of reactivity towards $\text{HBr}$ : 
- A$\text{a > b > c}$
- ✓$\text{b > a > c}$
- C$\text{b > c > a}$
- D$\text{a > c > b}$
✓
Answer
Correct option: B.
$\text{b > a > c}$
Among $\text{a, b}$ and $\text{c}$ electron donating ability order is $-\mathrm{OCH}_3 > -\mathrm{CH}_3 > -\mathrm{CH}_2 \mathrm{OCH}_3$ more the electron donating ability of substituent more is the stability of carbocation.
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