Which regiment of the British Army has 5 buttons at the cuff of their uniforms?

The regiment of the British Army known for having five buttons at the cuff of their uniforms is the Grenadier Guards. This distinctive feature is part of their ceremonial dress, reflecting their long-standing traditions and history. The Grenadier Guards are one of the oldest regiments in the British Army and are primarily known for their role in ceremonial duties, including guarding the monarchy.