Select the letter cluster that can replace the question mark (?) in the following series.
TDN, VGS, XJX, ?, BPH
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → ZMC
Each position of the cluster is checked on its own; after Z the count continues from A.
First letters T (20), V (22), X (24): 2 places ahead each time, so the missing letter is \(24+2=26\), Z, and 2 ahead of Z are A, B, which matches the last term
Second letters D (4), G (7), J (10): 3 places ahead each time, so the missing letter is \(10+3=13\), M, and \(13+3=16\) gives P, which matches the last term
Third letters N (14), S (19), X (24): 5 places ahead each time; 5 ahead of X are Y, Z, A, B, C, and 5 ahead of C (3) is \(3+5=8\), H, which matches the last term
So the missing cluster is ZMC.