A child with recurrent muscle cramps and spams On analysis there is hypokalemia , metabolic alkalosis , hypocalciuria but increased urinary magnesium . What is the most probable diagnosis ?: (A) Bartter syndrome, (B) Gittelman syndrome, (C) Liddle syndrome, (D) None of the above
Answer is B. Gittelman syndrome  :
Defect in Na-Cl co-transporter.
Hypokalemic metabolic alkalosis.
Hypocalciuria - No stones in urine.
Hypomagnesemia due to ↑ urinary magnesium.