Choose the pair in which the words are differently related from the rest.

The answer is C. Awl : Cobbler.

A scalpel is a small, sharp knife used in surgery. A chisel is a tool with a sharp blade used for cutting or shaping wood, stone, or metal. A knife is a tool with a sharp blade used for cutting food or other materials. A chef is a person who prepares and cooks food professionally.

An awl is a tool with a pointed, sharp tip used for making holes in leather, wood, or other materials. It is not typically used by cobblers, who are people who repair and make shoes. Instead, cobblers typically use a variety of other tools, such as hammers, nails, and lasts.

Therefore, the pair Awl : Cobbler is the odd one out.