In the following question, a matrix of certain characters is given. These characters follow a certain trend, row-wise or column-wise. Find out this trend and choose the missing character accordingly.
Z ? S
R O ?
? G C

Answer: C. WKJ

The letter in the second column is three steps behind that in the first column, and the letter in the third column is four steps behind that in the second column.
So, the missing letter in the first row will be three steps behind Z, which W.
The missing letter in the second row will be four steps behind O, which is K.
The missing letter in the third row will be three steps ahead of G, which is J.