Which of the following statements is wrong?

MCQ

A
Ethyl chloride on reduction with $Zn-Cu$ couple and alcohol gives ethane.
✓
The reaction of methyl magnesium bromide with acetone gives butanol $-2$
C
Alkyl halides follow the following reactivity sequence on reaction with alkenes.
$R - I > R - Br > R - Cl > R - I$
D
$C_2H_4Cl_2$ may exist in two isomeric forms

✓

Answer

Correct option: B.

The reaction of methyl magnesium bromide with acetone gives butanol $-2$

b
$\begin{matrix}
C{{H}_{3}} \\
C{{H}_{3}} \\
\end{matrix}>\,C\,=\,O\,+\,C{{H}_{3}}C{{H}_{2}}MgBr\,\to $ $\begin{matrix}
C{{H}_{3}} \\
C{{H}_{3}} \\
\end{matrix}>\,C\,<\,\begin{matrix}
OMgBr \\
C{{H}_{2}}C{{H}_{3}} \\
\end{matrix}\,\xrightarrow{{{H}_{2}}O}$ $\underset{\begin{smallmatrix}
2\,\,methyl\,\,bu\tan ol\,\,-\,2 \\
\,\,\,\,\,\,\,({{3}^{o}}\,\,alcohol)
\end{smallmatrix}}{\mathop{\begin{matrix}
C{{H}_{3}} \\
C{{H}_{3}} \\
\end{matrix}>\,C\,<\,\begin{matrix}
OH \\
C{{H}_{2}}C{{H}_{3}} \\
\end{matrix}}}\,$

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How many primary, secondary, tertiary and quaternary carbons are present in the following hydrocarbon

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