<prompt> Low serum haptoglobin in hemolysis is masked by -PregnancyLiver diseaseBile duct obstructionMalnutriotion  <response>: Haptoglobin is an acute phase protein and its level increased in case of any inflammation. In hemolytic anemias there is fall in serum haptoglobin levels. If there is any inflammation along with it there will be rise in haptoglobin levels as it is an ac phase protein eg biliary obstruction causes inflammation Ref:Postgraduate Hematology by Victor Hoffbrand pg 127 Ref Robbins 9e pg 419 