<prompt> Pasteurization of milk is achieved by boiling at -65 oC for 30 min72 oC for 10 sec100 oC for 20 sec136 oC for 30 sec  <response>: In holder method milk is kept at 63-66 deg C for atleast 30 min.REF.PARKS TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICINE.Editon-21.Page no.-606 