Select the option that represents the letters that, when sequentially placed from left to right in the blanks below, will complete the letter series._ A A _ F _ A N F A _ _ _ A A N

Let's count the total number of letters and blanks. The expression has 16 positions. Let's look for a repeating pattern pattern by dividing into groups of 4:_ A A _ | F _ A N | F A _ _ | _ A A NBy observing the elements, a clear pattern emerges where each block forms the word F A A N:First block: F A A N (Blanks filled: F, N)Second block: F A A N (Blank filled: A)Third block: F A A N (Blanks filled: A, N)Fourth block: F A A N (Blank filled: F)Let's check the options sequentially for the blanks:The sequence of filled letters from left to right is: F, N, A, A, N, FThis perfectly matches Option D.