Four letter-clusters have been given, out of which three are alike in some manner and one is different. Select the letter- cluster that is different.

| Question | Four letter-clusters have been given, out of which three are alike in some manner and one is different. Select the letter- cluster that is different. | |
| Type | multiple_choice | |
| Option | dEefFF | correct |
| Option | mnNoOO | incorrect |
| Option | uvVwWW | incorrect |
| Option | pqQrRR | incorrect |
| Solution | Except option A all the other option contain 1st two letters are small in letter. | |