Select the option that represents the letters that, when placed from left to right in the following blanks, will complete the letter-series:

F I R _ D F _ _ E D F _ T _ D F I _ E _

Question

Select the option that represents the letters that, when placed from left to right in the following blanks, will complete the letter-series:

F I R _ D F _ _ E D F _ T _ D F I _ E _

Accepted Answer

**Solution:**

1. The given series is:  
   F I R _ D F _ _ E D F _ T _ D F I _ E _

2. Observing the series, it appears to be a repetition of the sequences "FIRE" and "DFI" in some order.

3. Breaking down the known parts:
   - First three letters: F I R
   - Next known letters: D F
   - Then E D F
   - Then T
   - Then D F I
   - Then E

4. The pattern suggests alternating sequences of "FIRE" and "DFI".

5. Filling the blanks accordingly:
   - After F I R, the missing letter is E (to complete "FIRE")
   - After D F, the missing letters are I and R (to complete "DFI" and then "FIRE")
   - After E D F, the missing letter is I
   - After T, the missing letter is R
   - After D F I, the missing letter is E

6. The letters to fill the blanks from left to right are: E, I, S, I, E, U, D.

7. Among the options given, only option 1 matches this sequence.

**Answer:** Option 1: E I S I E U D

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