<prompt> A 15 day old baby presented to the emergency depament with history of seizures. Blood tests revealed serum calcium of 5mgdl, serum phosphate of 9 mgdl and an intact PTH of 30 pgml Normal Intact PTH 10-60 pgml. Which of the following is the most likely diagnosis?PseudohypoparathyroidismHypoparathyroidismVitamin D DeficiencyHypoxic Ischaemic Encephalopathy  <response>: Baby is showing features of relative hypoparathyroidism. In hypoparathyroidism serum calcium level is decreased, Phosphate level is increased and PTH levels is inappropriately normal, low or undetectable. Ref: Endocrinology and Metabolism By Pauline M. Camacho page77; The Cambridge encyclopedia of human paleopathology By Ahur C. Aufderheide, Conrado Rodriguez-Main, Odin Langsjoen page 333. 