Which word does NOT belong with the others?

The guitar, violin, and cello are stringed instruments; the flute is a wind instrument.

Loaf, sourdough, and pumpernickel are types of bread. A rye is not a bread type.

Loaf - Bread that is shaped and baked in one piece and usually sliced before being eaten.

Pumpernickel - Dark, dense German bread made from coarsely ground whole-grain rye.

Sourdough - Leaven for making bread, consisting of fermenting dough, typically that left over from a previous batch.

Rye - A wheatlike cereal plant that tolerates poor soils and low temperatures.

Tulip, rose, and daisy are all types of flowers. A bud is not.

Tyre, steering wheel, and engine are all parts of a car.

An ounce measures weight; the other choices measure length.

A branch, leaf, and root are all parts of a tree. The dirt underneath is not a part of the tree.

Freeway, interstate, and expressway are all high- speed highways; a street is for low-speed traffic.

Heading, body, and closing are all parts of a letter; the letter is the whole, not a part.

The yarn, twine, and cord are all used for tying. The tape is not used in the same way.

A leopard, cougar, and lion all belong to the cat family; an elephant does not.