<prompt> Obesity with mental retardation is seen in ?Prader-Willi syndromeTurner syndromeFragile-X syndromeNoonan syndrome  <response>: Ans. is a i.e., Prader-Willi syndrome Prader-Willi syndrome is characterized by : Mental retardation Sho stature Hypotonia Obesity Hyperphagia Small hands and feet Hypogonadism. 