Concept:Each letter in the first group is shifted forward by 6 positions in the alphabet to form the second group.Explanation:For ACE, add 6 to each letter: A+6=G, C+6=I, E+6=K, giving GIK.Similarly for BDF: B+6=H, D+6=J, F+6=L, so the missing term is HJL.Among the options, HJL matches option D.
