Select the letter-cluster from among the given options that can replace the question mark (?) in the following series. DAG, FCI, ?, JGM, LIOAWUGBYOICHOKDHEKAnswer: D. HEK Read Explanation: Observe each position in the letter cluster separately:1st letters: D, F, H, J, L → increase by 22nd letters: A, C, E, G, I → increase by 23rd letters: G, I, K, M, O → increase by 2So the missing letter cluster is:H E KAnswer: HEK Read more in App