Which of the following reactions involves molecular rearrangement?

Options

A. `CH_(3)CH_(2)CH_(2)OHoverset(H_(2)SO_(4))rarrCH_(3)CH=CH_(2)`
B. `CH_(3)CH_(2)underset(OH)underset(|)CHCH_(3)overset(H_(2)SO_(4))rarrCH_(3)CH=CHCH_(3)`
C.
D. `(CH_(3))_(3)C CH_(2)OHoverset(H_(2)SO_(4))rarr(CH_(3))_(2)C=CHCH_(3)`

Answer

D

Explanation

It involves the rearrangement of carbon skeleton through the rearrangement of intermediate carbocation.
Reaction `(1)` and `(2)` are `beta`-elimination reaction while reaction `(3)` is an example of electrophilic aromatic substiution.