Which of the following condition is not associated with osteoporosis?: (A) Immobilization, (B) Thyrotoxicosis, (C) Turner's syndrome, (D) Hypoparathyroidism
Answer is D. Osteoporosis is associated with hyperparathyroidism. In hyperparathyroidism, excess parathyroid hormone in the blood stimulates extraction of calcium from bone to blood stream resulting in osteoporosis.