The odd one out is B, turban. The other three options, gloves, hat, and cap, are all headwear. A turban is a headdress worn by some people of the Indian subcontinent, Central Asia, and the Middle East. It is typically made of a long piece of cloth that is wrapped around the head in a variety of ways. Turbans are often worn for religious or cultural reasons, but they can also be worn for fashion or to protect the head from the sun or cold.
Gloves are coverings for the hands, typically made of leather, cloth, or other material. They are worn to protect the hands from cold, heat, or injury. Gloves can also be worn for fashion or to improve grip.
A hat is a covering for the head, typically worn for protection from the sun or cold, or for fashion. Hats come in a variety of shapes and sizes, and are made from a variety of materials, including cloth, straw, fur, and leather.
A cap is a type of hat that is typically worn for sports or casual wear. Caps are typically made of cloth or cotton, and have a visor to protect the face from the sun.