Select the option that represents the letters that, when placed from left to right in the same sequence in the blanks below, will complete the letter series.

Z A _ _ X C _ _ C D _ A Y B X _ A B C _ Z _ Y B _ C A _ _ D

Given: Z A _ _ X C _ _ C D _ A Y B X _ A B C _ Z _ Y B _ C A _ _ D

Option (a); Y B A A Z B D A Y B C

​Z A YB X C AA C D/ Z A Y B X B A B C D/ Z A Y B Y C A BC D

It is incorrect,

Option (b); Y B D B A C D B X B C

​Z A Y B X C D B C D A A Y B X C A B C D Z B Y B X C A D

It is also incorrect,

Option (c); Y B A C B C D A X A C

​Z A YB X C AC C D B A Y B X C A B C D Z A Y B X C A AC D

It is also incorrect,

Option (d); Y B A B Z C D A X B C

​Z A YB X C /AB C D/ Z A Y B X C /A B C D /Z A Y B X C /A BC D

It is correct, Because follow the logical pattern in this series;

Thus, the correct answer is Option (d); Y B A B Z C D A X B C.​