Question

2,3-Dimethyl-2-butene can be prepared by heating which of the following compounds with strong acid?

(1) (CH3)2C=CH–CH2–CH3

(2) (CH3)2CH–CH–CH=CH2

(3) (CH3)2CH–(CH3)CH–CH=CH2

(4) (CH3)3C–CH=CH2

Please answer with mechanism (or reason why).
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Answer 1

(4) (CH3)3C-CH=CH2 is th correct answer

Answer 2

Hey !

Refer the below attachment !

Thanks !