1. 

In the following question, a letter series is given. Some of the letters of the series are missing. This missing letters are given in same order as one of the four/five alternatives below the series. Find out the correct alternative.

abc__ya bc__xw abc dev__

A. zdu
B. dxu
C. cdu
D. zyw
E. None of these

Answer: Option A

Explanation:

abczy/abcdxw/abcdevu

Required answer = zdu