The compound which gives the most stable carbonium ion on dehydration is

Options

A. `CH_(3) - underset(CH_(3)) underset(|)(C ) H - CH_(2) OH`
B. `CH_(3)- overset(CH_(3)) overset(|) underset(CH_(3)) underset(|)( C) - OH`
C. `CH_(3) - CH_(2) - CH_(2)- CH_(2) OH`
D. `CH_(3) - underset(CH_(3)) underset(|)(C ) H - CH_(2) - CH_(3)`

Answer

B

Explanation

`CH_(3) overset(CH_(3)) overset(|) underset(CH_(3))underset(|) ( C) - OH to underset("(Carbonium ion)") (CH_(3) - overset(CH_(3))overset(|)underset(CH_(3))underset(|)( C^(+)))`
Carbonium ion most stable due to +I effect of three methyl groups and hyperconjugation by `9 alpha` hydrogens