Select the letter-cluster that can replace the question mark (?) in the following series. GHB, LMG, PQK, ?

Select the letter-cluster that can replace the question mark (?) in the following series. GHB, LMG, PQK, ?
QuestionSelect the letter-cluster that can replace the question mark (?) in the following series. GHB, LMG, PQK, ?
Typemultiple_choice
OptionSTNcorrect
OptionTSMincorrect
OptionPQEincorrect
OptionABXincorrect

Solution:

ssc reasoning
GkSeries Editor:
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