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
Low calcium and high phosphate is seen in - 
Select and explain. 
A. Hyperparathyroidism, B. Hypoparathyroidism, C. Hypehyroidism, D. Hypothyroidism
B: Hypoparathyroidism
Answer: B: Hypoparathyroidism 
Explanation: Ans is option 2 Hypoparathyroidism In hypoparathyroidism there is decreased PTH which leads to decreased activation of osteoclasts in bone which leads to decreased Ca++ In kidney Decreased PTH leads to decreased Ca++ reabsorption and increased reabsorption of phosphate Which leads to low Ca level and high phosphate level Ref Harrison 17/e p2391