<prompt> Which of the following drug is implicated in the causation of osteomalacia of the bone?PhenytoinSteroidsHeparinEstrogen  <response>: Phenytoin inhibit the hepatic production of 25 hydroxy vitamin D and also directly inhibit bone mineralization and thus may result in osteomalacia. Steroids and heparin result in osteoporosis not osteomalacia. Impoant drugs causing osteomalacia are: Phenytoi Carbamazepine Valproate Phenobarbitone Bisphosphonates 