Select the option that represents the letters that when placed sequentially from…

Correct Answer: TGRTSRG

Solution:
Given series:
R _ S _ _ _ S G R T _ G _ T S _
If we place TGRTSRG sequentially in the blanks:
R T S G R T S G R T S G R T S R? Wait — the final sequence should be checked carefully based on the blank positions.
The blanks are filled from left to right with:
T, G, R, T, S, R, G
Thus the series becomes:
RTSGRTSGRTSGRTSG
This follows a clear repeating pattern of RTSG.Therefore, the correct option is:
3. TGRTSRG