Which of the following compound gives the most stable carbonium ion during a dehydration reaction?
1
\(\rm \begin{matrix} \rm CH_3-CH-CH_2OH\\ |\ \ \ \ \ \ \ \ \ \\\ \rm CH_3\ \ \ \ \ \end{matrix}\)
2
\(\rm \begin{matrix} \rm CH_3-CH-CH_2-CH_3\\ |\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \\\ \rm OH\ \ \ \ \ \ \ \ \ \ \ \ \end{matrix}\)
3
\(\begin{matrix}\rm CH_3\\\ |\ \ \ \ \ \\\ \rm CH_3-C-OH\ \ \ \ \ \ \\\ |\ \ \ \ \\\ \rm CH_3\end{matrix}\)
4
CH3CH2CH2CH2OH
5
Not Attempted