Question

The major product [B] in the following reactions is

• A.
• B.
• C.
• D.

Answer 1

The correct option is B

Ethers can be reactive under ​drastic reaction conditions (high temperature, high concentration) due to the cleavage of the C-O bond.​
In first step of the reaction, protonation of ether $\left(O\right)$ group take place.
In second step, $S_{N}2$ reaction take place, where $I^{-}$ nucleophile will attack the less hindered site.

Reaction of (A) with dil.$H_{2}S{O}_4$ result in protonation of $OH$ group followed by removal to water molecule to form primary carbocation which undergoes rearrangement to form stable tertiary carbocation followed by deprotonation to give a stable more substituted alkene product.

Hence, option (c) is correct.