Which of the following letter-clusters will replace the question mark (?) and complete the following letter-cluster series

Which of the following letter-clusters will replace the question mark (?) and complete the following letter-cluster series

Which of the following letter-clusters will replace the question mark (?) and complete the following letter-cluster series?

LE, OJ, UO, DT, ?

A.            PZ

B.            QY

C.            PX

D.            PY

Sol:

Pattern follows here is:

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