In Choose odd Letter Group type questions, usually five groups of letters are given. Four of them are similar to each other in some manner while one is different and this is to be chosen by the candidate as the answer.
BCYZ , EFVW , HIUV , JKQR , ABZA
In all other groups, first and second letters are consecutive;
third and fourth are consecutive and the third letter occupies the same position from Z backward as the first occupies from A onward.