This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
Oil red Or staining is used for 
Select and explain. 
A. Frozen section, B. Glutaraldehyde fixed specimen, C. Alcohol fixed specimen, D. Formalin fixed specimen
A: Frozen section
Answer: A: Frozen section 
Explanation: ref Bancroft histology 7/e p83 Fresh cryostat sections must be used for oil red o stain