निम्नलिखित श्रृंखला में केवल एक अक्षर-समूह (letter-cluster) गलत है। गलत अक्षर-समूह का चयन करें: INK, KPJ, MRI, OTH, QWG, SXF

What should come in place of the question mark (?) in the given series based on the English alphabetical order? PPE, NOH, LNK, JMN, ?

Which letter will replace the question mark (?) in the following letter series? U, Q, M, I, ?