A 10 years old boy is having polyuria, polydipsia. Laboratory data showed (in meq/L): Na+ - 154, K+ - 4.5, HCO3- 22, S. Osmolality - 295, B. Urea - 50, Urine specific gravity - 1.005 What is the diagnosis?
Diabetes insipidus Renal tubular acidosis Bater's syndrome Recurrent UTI