​Choose the work which is different from the rest.

Lets check all options;

Option (a): Cot

A cot is a bed or bedding that provides a surface to sleep on. It is an item used for sleeping, but it is not a fabric or covering, unlike the other items.

Option (b): Pillow

A pillow is used to support the head while sleeping. It is a soft object that is used for comfort during sleep, but it's a covering for the head, unlike a cot which is a surface.

Option (c): Sheet

A sheet is a piece of fabric that covers the mattress or is used as a covering on top of the body while sleeping. It is a bedding item, like a pillow or a quilt, and is made of fabric.

Option (d): Quilt

A quilt is a type of bedding made of layers of fabric, typically used as a blanket to keep warm while sleeping. It is similar to a sheet, as it is made of fabric and used for covering.

Now option (a) is odd in all options;

Cot is the odd one out because it is not made of fabric like the other items (pillow, sheet, and quilt). Cot refers to the sleeping surface rather than a covering or fabric item.

Thus, the correct answer is (a).