'Laissez-moi tranquille!' is the correct French translation for 'Leave me alone!' using the imperative form of 'laisser' (let/leave), the pronoun 'moi' (me), and the masculine adjective 'tranquille' (calm/alone). Option A uses 'toi' (you), C misspells 'Laissez', and D uses the incorrect 'tranquil' spelling.