<prompt> The following tests are used to check the efficiency of pasteurization of mild except -Phosphatase testStandard plate countColiform countMethylene blue test  <response>: Ans is d i.e., Methylene blue test Methylene blue Reduction test is an indirect test Jar detection of microorganism in milk. It is carried out on milk prior to the process of pasterurization and is not used to check the efficiency of pasteruization. 