The odd one out is sugar beet. All the other options are root vegetables, while sugar beet is a root vegetable that is used to make sugar.
Garlic is a bulb vegetable that is used in cooking. It has a strong flavor and is often used to add flavor to food.
Chilli is a fruit that is used in cooking. It has a hot flavor and is often used to add heat to food.
Ginger is a root vegetable that is used in cooking. It has a strong flavor and is often used to add flavor to food.
Potato is a root vegetable that is used in cooking. It is a starchy vegetable and is often used as a staple food.