Correct Answer: Pencil – Rub

Solution : Let's check each option –
First option: Question – Answer; A question is generally followed by an answer and directly related to each other in a supportive way.
Second option: Pencil – Rub; Rub is used to remove pencil marks, but not related to pencil in a direct supportive way.
Third option: Cup – Saucer; A cup is generally placed on a saucer and directly related to each other in a supportive way..
Fourth option: Chair – Table; A chair is generally paired with a table and directly related to each other in a supportive way..

So, only the second option is different from the other three options. Hence, the second option is correct.