What is the missing term @ in the following?

ACPQ : BESU :: MNGI : @

The correct option is NPJM.

To find the missing term in the analogy ACPQ : BESU :: MNGI : @, let us analyze the pattern established between the first pair of letter clusters, ACPQ and BESU.
We compare the corresponding letters of each term based on their positions in the English alphabet:

1. First letter: A → B (moves forward by +1 shift: A + 1 = B)
2. Second letter: C → E (moves forward by +2 shifts: C + 2 = E)
3. Third letter: P → S (moves forward by +3 shifts: P + 3 = S)
4. Fourth letter: Q → U (moves forward by +4 shifts: Q + 4 = U)

Thus, the overall pattern of letter shifts applied from the first group to the second group is +1, +2, +3, +4.

Now, we apply the exact same logic and shift pattern to the third group, MNGI, to determine the missing term (@):

1. First letter: M + 1 = N
2. Second letter: N + 2 = P
3. Third letter: G + 3 = J
4. Fourth letter: I + 4 = M

Combining these letters gives the resulting term NPJM.