Concept:The pattern involves increasing each letter by a fixed step and adding a constant to the number.Explanation:From BK220 to DN720: B→D (+2), K→N (+3), and 220→720 (+500). From DL170 to FO670: D→F (+2), L→O (+3), and 170→670 (+500). Apply the same to AD120: A (1) + 2 = C (3), D (4) + 3 = G (7), and 120 + 500 = 620. Thus, AD120 becomes CG620.
