Concept:The pattern involves shifting each letter backward or forward by fixed positions and subtracting 100 from the number as a whole.Explanation:For MM167 → LP67:First letter M (13th) minus 1 gives L (12th). Second letter M (13th) plus 3 gives P (16th). Number 167 minus 100 gives 67.For LL197 → KO97:First letter L (12th) minus 1 gives K (11th). Second letter L (12th) plus 3 gives O (15th). Number 197 minus 100 gives 97.Apply same logic to NN207:N (14th) minus 1 gives M (13th). N (14th) plus 3 gives Q (17th). Number 207 minus 100 gives 107.Thus the missing cluster is MQ107.