<prompt> Closure of the anterior fontanelle is delayed in all except-Downs syndromeOsteogenesis imperfectaHypogonadismHypothyroidism  <response>: Ans. is c i.e., Hypogonadism Delayed closure of anterior fontanel ide large anterior fontanel o The anterior fontanel normally closes between 12 to 18 months of age. o The presence of excessively large anterior fontanel and its delayed closure is a recognised clinical feature in following conditions. 