Select the option that represents the letters that, when sequentially placed from left to right in the blanks below, will complete the letter series.
T_OJEW_TRO_EWF _ROJ _WFTR_JE_F

The given string with blanks is  T _ O J E W _ T R O _ E W F _ R O J _ W F T R _ J E _ F

Notice that the seven­-letter block $$T\,R\,O\,J\,E\,W\,F$$ appears more than once. Let us test whether the entire series is simply this block repeated.

Write the block $$TROJEWF$$ four times (because there are 28 positions):
T R O J E W F T R O J E W F T R O J E W F T R O J E W F

Number the positions 1-28 and compare them with the original string (blanks are underscored):
1 T 2 _ 3 O 4 J 5 E 6 W 7 _ 8 T 9 R 10 O 11 _ 12 E 13 W 14 F 15 _ 16 R 17 O 18 J 19 _ 20 W 21 F 22 T 23 R 24 _ 25 J 26 E 27 _ 28 F

Now fill each blank with the letter that the repeated block demands:

Position 2 → R   Position 7 → F   Position 11 → J   Position 15 → T   Position 19 → E   Position 24 → O   Position 27 → W

Reading these inserted letters from left to right gives the sequence: $$R\,F\,J\,T\,E\,O\,W$$.

Option A exactly matches this order: RFJTEOW.

Hence, the correct choice is
Option A which is: RFJTEOW