Primary end-point Assessing the cost of metal versus plastic stenting in inoperable malignant distal common bile duct strictures in patients with expected survival of 3 months or more as palliation of symptomatic obstructive jaundice. Cost to be assessed in terms of hardware, hospital stay and readmissions for stent occlusion(patency) and complications Secondary end-point Assessing quality of life using a validated scoring system(EORTC QLQ 30) in patients receiving a metal or plastic biliary stent as definitive means of palliation of malignant obstructive jaundice