This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Anatomy
Marker of cell membrane is/are 
Select and explain. 
A. 5-Nucleotidase, B. LDH, C. Galactosyltransferase, D. Catalase
A: 5-Nucleotidase
Answer: A: 5-Nucleotidase 
Explanation: Na+/K+-ATPase -- plasmalemma, glucose-6-phosphatase---endoplasmic reticulum, galactosyltransferase----- Golgi apparatus, succinate dehydrogenase ----- mitochondria, acid phosphatase --- lysosomes, catalase---- peroxisomes and lactate dehydrogenase --- cytosol.