<prompt> Nail patella syndrome is characterized by -a Iliac hornb Sacral hornc Absent patellad Knee deformitye Dislocation of patellabcebdeacdeabde  <response>: The disease is characterized by :-Unduly small or absent patellaNail dysplasia nail dystrophy most commonly in thumbnailRecurrent dislocation of patellaPostero-lateral subluxation of radial headBony excrescences on lateral aspect of the ileum, i.e. iliac horns.Genu valgumCongenital nephropathy 