Which of the two stereoisonmers of 4-t butylcyclohexy iodide `.^(127)I^(-).` will undergo substitution with `.^(128)I^(-)` faster , and why?

Options

A. A will react faster because it is the more stable of the isomers
B. A will reacts faster because it will yield a more stable product ,and the transition state for both reactions is of the same energy
C. A will react faster because the approch of `.^(128)I^(-)` can deparat unhindered .
D. B will react faster be because it is less stable than A, and the transition state for both reactions is of the same energy.

Answer

d

Explanation

`to ` due 1,3 repulsion l.G tenency increases so rate of reactio increases.