MCQ
The compound which undergoes $S_{N^1}$ reaction most rapidly is
- A

- ✓

- C

- D







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Figure $\xrightarrow[{(ii)\,\,NaB{D_4}}]{{(i)\,\,Hg{{(OAc)}_2}\,{H_2}O}}Q$
Figure $\xrightarrow[{(ii)\,\,{H_2}{O_2}\,/\,O{H^ - }}]{{(i)\,\,B{D_6}\,,\,THF}}R$
Products $P, Q$ and $R$ are
[Atomic mass: $\mathrm{Ag}=108, \mathrm{Br}=80$ ]
$3$-ethyny$l-2$-hydroxy-$4$-methylhex-$3$-en-$5$-ynoic acid?