Sensory block will be evaluated using the pinprick test using 22-gauge hypodermic needle, and it will be judged adequate if there will be a complete loss of pinprick sensation at T12 in the spinal group, or in the femoral and sciatic nerve distribution in the sciatic-femoral group. Onset of Motor blockade will be taken when Bromage score 4 would have been achieved. Bromage score 1- free movement of legs and feet; 2- just able to flex knees; 3- unable to flex knees but free movement of feet; 4- unable to move legs or feet. VAS score would be assessed after the procedure and surgery. Patients' vitals will be recorded before procedure, just after the procedure and intraoperative at 5, 15 and 30 min of surgery. After completion of surgery, hemodynamic parameters would be recorded and patient would be asked about VAS score. After surgery, patient's and surgeon's satisfaction would also be evaluated as 'Yes' or 'No'. Duration of analgesia will be calculated from onset of sensory blockade to 1st requirement of analgesic (VAS score >5). Injection Diclofenac- 75mg iv infusion will be given for treatment of pain.