All the patients selected for study will have a detailed general examination including airway assessment, spine, and systemic examination .Patient will be kept nil-by-mouth for 6 to 8 hours. Sedatives and hypnotics will be avoided in premedication as well as intraoperatively.All patients will be premedicated with antiemetic agent - Inj ondansetron(4 mg). In O.T. patient will be preloaded with R.L. 10-15 mL/kg.Pre-operative parameters like pulse rate, respiratory rate, oxygen saturation and blood pressure will be noted.