<prompt> Indication for surgery in Necrotizing Enterocolitis is?Pneumatosis intestinalis- Stage IIA of NECPneumoperitoneum- Stage IIIB of NECPoal Vein gas- Stage IIB of NECPeritonitis- Stage IIIA of NEC  <response>: Pneumoperitoneum -NEC stage 3b- intestinal perforation occurs. Treatment includes suppoive care along with surgery. Modified Bells Staging Criteria: 