Which of the following combinations is correctly matched?

Options

A. `{:("compound", "Reaction", "Sterochemistry"),(CH_3-undersetoverset(|)(D)oversetunderset(|)(H)(C )-Cl, SN^2, "Walden in version"):}`
B. `{:("compound", "Reaction", "Sterochemistry"),(CH_3-undersetoverset(|)(D)oversetunderset(|)(H)(C )-Cl, SN^2, "Walden retention"):}`
C. `{:("compound", "Reaction", "Sterochemistry"),(C_6H_5-undersetoverset(|)(CH_3)oversetunderset(|)(C_2H_5)(C )-Cl, SN^1, "Retention in configuration"):}`
D. `{:("compound", "Reaction", "Sterochemistry"),(C_6H_5-undersetoverset(|)(CH_3)oversetunderset(|)(C_2H_5)(C )-Cl, SN^1, "inversion in configuration"):}`

Answer

A

Explanation

Mechanism of `SN^1 " and " SN^2`