An SN2 reaction mechanism involves: | One Paper Preparation

A) A two-step process

B) A one-step concerted process with backside attack and inversion of configuration

C) Radical intermediates

D) Elimination only

Explanation

SN2: single step, bimolecular. Nucleophile attacks from behind, inverts stereochemistry (Walden inversion). Favored by primary substrates.