In the series of alphabets given, which is the missing alphabet series?AX, DU, GR, _____________, ML.
_ baa _ aab _ a _ a
ba _ b _ aabb _ a _ _ a _ bb
_ c _ bd _ cdcda _ a _ db _ a
In the following alphabetical series, a combination of two alphabets is missing, denoted by the question marks (??). Choose the missing term from the given options. HH, IG, KE, NB, ??