<prompt> An infant is crying excessively even after being given good fed. He is passing a large quantity of urine and repeatedly getting dehydrated. Urine examination shows no proteinuria and a specific gravity of 1004. The most likely diagnosis isDiabetes mellitusDiabetes insipidusCongenital nephrotic syndromeProtein losing enteropathy  <response>: This child has low urinary specific gravity.Amongst the given options only DI causes low urinary specific gravity. 