<prompt> Trident hand seen inachondroplasiamucopolysaccharoidosisdiphyseal achlasiacleido-cranial dystosis  <response>: Ans is a i.e. achondroplasia Trident hand: The hands are short and broad. The central 3 digits being divergent and of almost equal length.More about Achondroplasia Inheritance - ADIt is caused by failure of normal ossification of bones, mainly the long bones resulting in dwarfism.Dwarfism is disproportionate since growth of the trunk is only marginally affected. USLS is 1Shortening is specially marked in the proximal segments of the limbs.Intelligence is normalThere is marked lumbar lordosis which may occasionally lead to compression of the spinal cord. 