A 6 month old boy weighing 3.2 kg presents with recurrent vomiting and polyuria.Investigations show blood area 60 mg/dl creatinine 0.7 mg/dl, calcium 12.8 mg/dl, phosphate 3 mg/dl, pH 7.45, bicarbonate 25 mEq/L and PTH 140 pg ml(normal

• A. Batter syndrome
• B. Mutation of the calcium sensing receptor
• C. Pseudo-pseudohypoparathyroidism
• D. Parathyroid adenoma