This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Anatomy
Jansen disease is 
Select and explain. 
A. Defect of PTH receptor, B. Defect of GH receptor, C. Defect of ADH receptor, D. Defect of Thyroid receptor
A: Defect of PTH receptor
Answer: A: Defect of PTH receptor 
Explanation: .