Biochemical difference between pseudohypoparathyroidism and hypoparathyroidism?

• A. Pseudohypoparathyroidism has low calcium, high phosphate, and elevated or inappropriate PTH due to end-organ resistance.
• B. Pseudohypoparathyroidism has high calcium and low phosphate.
• C. Pseudohypoparathyroidism has normal calcium and phosphate with elevated PTH.
• D. Pseudohypoparathyroidism has low PTH and low phosphate.

Answer: (A)