MCQ
Decreasing order towards $S_N 1$ reaction for the following compounds is:


- A$a > c > d > b$
- B$a > b > c > d$
- ✓$b > d > c > a$
- D$d > b > c > a$

$\therefore$ Reactivity order
$(b) > (d) > (c) > (a)$
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