This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Histo Pathology, Subject name: Pathology
[{'content': 'Which of the following is a stain for fat cells? \nSelect and explain. \nA. PAS, B. Prussian blue, C. Sudan IV, D. Alcian blue', 'role': 'user'}, {'content': 'Answer: C \nExplanation: ANSWER: (C) Sudan IVREF: See APPENDIX-24 for "HISTOLOGY/PATHOLOGY/ MICROBIOLOGY STAINS" APPENDIX - 24Histology/Pathology/Microbiology StainsT issue/substanoeStainCommentAmyloidGross stainingLugol\'s iodine Light microscopyH & E, Congo redPolarised lightCongo redMetachromatic stainMethyl violet, crystal violetFluorescent stainThioflavin TNon specific stainPAS, Toludine blue. Aldan blueCaldum/calcificationVon kossa Alizarin Red SFor small quantitiesCalcein Tetracycline labellingBest for bone mineralizationConnective tissueVan Gieson stain (Picric Add + Acid Fuchsin)Simplest method of differential staining of Collagen and other Connective TissueTrichome stain (Gomori trichrome stain, Lillie\'s trichome & Masson trichome)Red = keratin/muscleBlue/green = bone /\'collagenPink = cytoplasmCarcohydrate (Glycogen, cellulose etc)Periodic acid-Schiff stainNon specific for glycogenDiastaseSpecific for glycogenBest\'s carmine LipidSudan stains{Sudan III, IV, Sudan Back-B, Oil Red 0)Oil Red O largely replaced Sudan III and Sudan IVOil Red O is also used in a technique for staining latent fingerprintsOsmium tetra oxideAs a lipid stain, it is useful in scanning electron microscopy (SEM)LipofuscinSudan Black B MucinMuscarmineMost specific but less usefulPASMost sensitive, For neutral mucopolysaccharidesAlcian blue Bismark brownCan be used with live cellsColloidal iron Micro organismsFungiH & EBluePASRedGomori methamine silverMost sensitiveMycobacteriumZ N stain/methodCarbol fuchsinAuramine Rhodamine stainMost sensitive, mixture of Auramine O and Rhodamine B, used in fluorescence microscopySpirochetesWarthin starry silver stain H PyloriWarthin starry silver stainGiemsa stainH&E Pneumocystis/ Cryptococcus/ cocci diomycetesGomori methamine silver', 'role': 'assistant'}]