<prompt> Upper segment : lower segment ratio decreases in all of the following except?Spondylo epiphyseal dysplasiaAlagille syndromeAchondroplasiaPotts disease  <response>: Upper segment : lower segment ratio increases in Achondroplasia- cause of sho limb dwarfism. Sho trunk dwarfism US:LS ratio- decreases Sho limb dwarfism US:LS ratio- increases Sho- Spondyloepiphyseal dysplasia Rickets Man- Mucopolysaccharidosis Achondroplasia May- Mucolipidosis Osteogenesis imperfecta Climb- Caries spine potts disease Congenital hypothyroidism High- Hemiveebra Chondroectodermal dysplasia 