Organic Compounds Containing Oxygen: JEE Main 2025 Chemistry question

Which one of the following reactions will not lead to the desired ether formation in major proportion? (iso-Bu $\Rightarrow$ isobutyl, sec-Bu $\Rightarrow$ sec-butyl, nPr $\Rightarrow$ n-propyl, $^t$Bu $\Rightarrow$ tert-butyl, Et $\Rightarrow$ ethyl)