Three of the following four are alike in a certain way and form a group. Which one does not belong to that group?

Three of the following four are alike in a certain way and form a group. Which one does not belong to that group?

Four groups of letters are given below, three of them are alike in certain way while one is different, choose the odd one :

From the following alternatives find the one that does NOT belong to the rest.

In the following question, out of four words given below, three are alike in some manner and fourth word is different. Find the different one.

In a certain code, '256' means 'you are good'; '637' means ;we are bad' and '358' means 'good and bad'. Which of the following digits represents 'and' in that code?