<prompt> Hypervitaminosis of which of the following wil cause bony abnormalities: A Vit. AB Vit. DC Vit CD Vit. EE Vit. KVit. AVit. DVit CVit. E  <response>: Vit D excess increase intestinal calcium absorption if severe ,also increase bone resorption 7 - H17th2387 Vit.A intoxication cause hypercalcemia presumed to increase bone resorption Q - H17th2387 Metabolic Bone Disease Q The common metabolic bone disease is associatedin varying degree with depletion of bone tissue or bone mineral in some cases with systemic features of altered mineral metabolism The most common conditionfall into three groups: 1. Osteoporosis-in which the quantity of bone mass 3 is abnormally low 2. Osteomalacia- in which the osseous connective tissue osteoid is present butinsufficiently mineralised 3 3. Osteitis fibrosa- in which PTH overproduction leads to bone resorption 13 replacement by fibrous tissue 