Select the combination of letters that when sequentially placed in the blanks of the given series will logically complete the series.
_ F _ G E E _ E _ E E F _ G E E _ E G _

The correct answer is Option 1: EEFGEFE.

To determine the correct combination of letters to complete the given series, let us first analyze the total number of letters and spaces in the series.

The given pattern with blanks is:
_ F _ G E E _ E _ E E F _ G E E _ E G _

Counting all positions (letters plus blanks):
There are 21 positions in total.

We can divide the 21 positions into 3 repeating groups of 7 letters each:

Group 1: _ F _ G E E _
Group 2: E _ E E F _ G
Group 3: E E _ E G _

Let us test placing the letters from Option 1 (E E F G E F E) sequentially into the 7 blanks:

1st blank: E
2nd blank: E
3rd blank: F
4th blank: G
5th blank: E
6th blank: F
7th blank: E

Substituting these letters into the blanks gives:

Group 1: E F E G E E F
Group 2: E G E E F E G
Group 3: E E F E G E

Connecting all groups produces the complete sequence:
E F E G E E F | E G E E F E G | E E F E G E (which can also be viewed as a repeating shifted block of 7 letters: E F E G E E F followed by cyclic shifts, or repeating 7-letter components).

Thus, placing the sequence EEFGEFE logically completes the pattern.