Question: BKK, EII, HGG, (?), NCC

Solution: Identify the two parallel patterns in the triplets.

• First letters follow: B → E → H → K → N (each advances by 3 letters).

• Last two letters are identical and decrease by 2 letters each step: K K → I I → G G → E E → C C.

Therefore the missing term has first letter K and repeated pair EE, giving KEE.