| Question | Select the cluster from the given options that can replace the question mark (?) in the following series. KU, MO, PI, UE, ? | |
| Type | multiple_choice | |
| Option | AB | incorrect |
| Option | ZC | incorrect |
| Option | BA | correct |
| Option | CZ | incorrect |
| Solution | K + 2 = M; M + 3 = P; P + 5 = U; U + 7 = B (adding prime numbers) U, O, I, E, A (Vowels in reverse order) | |
