This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Medicine
All of the following statements about pseudohypoparathyroidtom are true, except - 
Select and explain. 
A. Decrease Serum PTH, B. Decrease Serum calcium, C. Increase Serum phosphate, D. Albright's hereditary osteodystrophy
A: Decrease Serum PTH
Answer: A: Decrease Serum PTH 
Explanation: Answer is option 1 Increase in serum PTH Pseudohypoparathyroidtom leads to end organ resistance to parathormone which in turn leads to decrease in serum Ca++ and increase in serum phosphate. Due to this negative feedback hyperplasia of parathyroid occurs and increase in parathormone secretion occurs Ref Harrison 17/e p2394