MCQ
Unknown $(A)$ is


- A

- B

- ✓

- D$\begin{matrix}
O \\
|| \\
Ph-C-Ph \\
\end{matrix}$






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Which response contains all the correct statement about this process ?
$(1)$ Dehydration $(2)\, E_2$ mechanism
$(3)$ Carbon skeleton migration $(4)$ Most stable alkene will form
$(5)$ Single-step reaction