MCQ
Consider the following transformations of a compound $P$.
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Choose the correct option($s$).
(image)
- ✓$B,C$
- B$A,C$
- C$A,D$
- D$A,B$
(image)
Choose the correct option($s$).
(image)

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| Leaving group | Conj. Acid $pK_a$ | $\%$ -yield of $2$-hexene | $\%$ -yield of $1$ -hexene |
| $X = I$ | $- 10$ | $81\%$ | $19\%$ |
| $X = Br$ | $-9$ | $72\%$ | $28\%$ |
| $X = Cl$ | $-7$ | $67\%$ | $33\%$ |
| $X = F$ | $3.2$ | $30\%$ | $70\%$ |
Which of the following statement is (are) true concerning this series of $E_2$ reactions ?