A STUDY TO COMPARE ANALGESIC EFFECT OF INTRATHECAL NALBUPHINE AND FENTANYL AS ADJUVANT IN PATIENTS UNDERGOING LOWER ABDOMINAL SURGERIES, Dr Ranjita Baksi, Dr Nibedita Sahu, Dr Anija Patanaik, INTERNATIONAL JOURNAL OF PURE MEDICAL RESEARCH : Volume- | Issue- | January-2024