Select the option that represents the letters that, when sequentially placed from left to right in the blanks below, will complete the letter series.
r d _ n _ d r _ _ b n n d _ r d b _ n d r
Answer & explanation
Correct answer: option 4
After dividing it into groups and comparing the corresponding term we, get "b n r d r n" as the repetitive term because it follows the pattern.
r d b n n d r rd b n n d r r d b n n d r