Concept:Each letter in the cluster moves forward by 2 positions in the alphabet, and the number increases by 180.
Explanation:First, observe the given pairs.
ACD220 → CEF400: Letters A→C (+2), C→E (+2), D→F (+2); numbers 220→400 (add 180).
WKT310 → YMV490: Letters W→Y (+2), K→M (+2), T→V (+2); numbers 310→490 (add 180).
Now apply to KPL180.
Letters: K+2 = M, P+2 = R, L+2 = N → MRN.
Numbers: 180 + 180 = 360.
So the missing cluster is MRN360.
Answer:MRN360 (Option C)
