Select the combination of letters that when sequentially placed in the blanks of the given series will complete the series.

A _ D K P A B _ K P A B F _ P A B _ K P

B E K G

A _ D K P A B _ K P A B F _ P A B _ K P

By using options one by one . We find that only Option 2 fit well to form a repeated series .

B E K G :- A B D K P  / A B E K P /  A B F K P /  A B G K P

B E K G is correct answer .