<prompt> Which among the following does NOT lead to pigment gallstone?TPNClonorchis sinensisHemolytic anemiaAlcoholic cirrhosis  <response>: Total parenteral nutrition TPN is associated with cholesterol and mixed stones. They develop sludge and stones due to stasis as there is no stimulus for contraction. Predisposing factors for pigment gallstone formation: Demographicgenetic factors: Asia, rural setting Chronic hemolysis Alcoholic cirrhosis Pernicious anemia Chronic biliary tract infection, parasitic infection Escherichia coli, Ascaris lumbricoides, Clonorchis sinensis Increased age Ileal disease, Ileal resection or bypass Cystic fibrosis Ref: Bailey Love 25e, Page 1120; Maingots 10e, Page 1720; Harrison 17e, Page 1993; Robbins 8e, Page 883 