This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
[{'content': "All of the following statements about Pseudohypoparathyroidism are true, except - \nSelect and explain. \nA. ↓Serum PTH, B. ↓ Serum calcium, C. ↑ Serum phosphate, D. Albright's hereditary osteodystrophy", 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]