This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Kidney, Subject name: Medicine
In Bater's Syndrome, which of the following is not seen- 
Select and explain. 
A. Metabolic Alkalosis, B. Hypokalemia, C. Hypomagnesemia, D. Decrease in urinary calcium
D: Decrease in urinary calcium
Answer: D: Decrease in urinary calcium 
Explanation: Bater's syndrome - There is loss of transpo function of Thick ascending loop of henle(TALH) Segment of nephron which results in hypokalemic metabolic alkalosis classic BS- typically suffer from polyuria and polydypsia due to reduction in renal concentrating ability . Increase in urinary calcium excretion 20% are hypomagnesemic. Marked activation of RAAS. Antenatal BS- They suffer from severe systemic disorder characterized by marked electrolyte wasting, polyhydramnios ,hypercalciuria with nephrocalcinosis . Ref:Harrison 20 th edition pg no 306.