<prompt> The recommended time for prophylactic antibiotic is:30 min prior to induction of anesthesia15 min after the initiation of surgeryAt the time of inductionAt the time of skin incision  <response>: Ans. A 30 min prior to induction of anesthesiaRef: Katzung 11the p898Antibiotic should be present in adequate concentration at the operative site before incision and throughout the procedure.Parenteral agents should be administered during the interval beginning 60 minutes before incision; administration up to the time of incision is preferred. 