<prompt> All of the following are causes of delayed dentition exceptRicketsHyperparathyroidismHypothyroidismCleidocranial dysplasia  <response>: Delayed dentition means there is no eruption of teeth by the age of 13 months of age mean 35D.Causes of delayed dentition:RicketsDown syndromeHypothyroidismHypoparathyroidismCleidocranial dysplasia 