Correct Option: B

In Judo, improvement and understanding of the art is denoted by a system of ranks split into ‘kyu’ and ‘dan’ grades. The final Dan is the twelfth dan, this is usually coloured white along with a judoka’s first belt, however the highest dan reached in judo remains 10th dan. Since there has never been any promotion to a rank above 10th dan, the Kodokan Judo promotion system effectively has only 10 dan ranks. There have only been 15 10th dans awarded by the Kodokan in the history of Judo.