Select the combination of letters that when sequentially placed in the blanks of thegiven series, will logically complete the series.

_ O S N R _ Q L P K _ J N I M _ L G K _​​

Given: _ O S N R _ Q L P K _ J N I M _ L G K _​​

Now, we check each options.

Option (a): VMQHE (Not Follow)

V O S N  R M Q L P K QJ N I M H L G K E

Option (b): TNOGF (Not Follow)​

T O S N R N Q L P K O J N I M G L G K F

Option (c): TMOHF (Follow)​

T O S N R M Q L  P K O J N I M H L G K F

Option (d): VNQGE (Not Follow)​

V O S N R N Q L P K Q J N I M G   L G K E

So, in the given series following pattern is: - 5 and + 4

Thus, correct option is (c).