<prompt> External auditory canal atresia has been associated with all of the following except?Low Bih WeightIntrauterine infectionsIntrauterine toxinsPolyhydramnios  <response>: Ans. isdi.e., Polyhydramnios External auditory canal atresia:The precise etiology of the failure of EAC canalization is not knownAssociations havJeen postulated between EACA and low bih weight, intrauterine trauma, toxins, infection.Genetic defects are being identified for several craniofacial anomalies. 