This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: miscellaneous, Subject name: Pathology
Lipid in tissue is detected by- 
Select and explain. 
A. Oil Red, B. Muciramine, C. PAS, D. Myeloperoxidase
A: Oil Red
Answer: A: Oil Red 
Explanation: Special stains for fat: Frozen sections stained with Sudan IV or Oil Red-O give an orange-red color to the fat. Osmic acid gives a black color Oil Red O is a lysochrome diazo dye used for staining of neutral triglycerides and lipids on frozen sections and some lipoproteins on paraffin sections. It has the appearance of a red powder with maximum absorption at 518 nm