What Kind of Membrane Protein Is Found Entirely Outside the Bilayer

Multiple Choice

What kind of membrane protein is found entirely outside the bilayer on either the extracellular or cytoplasmic surface? These proteins are covalently linked to a membrane lipid situated within the bilayer.

A) integral protein
B) lipid-anchored protein
C) peripheral proteins
D) carbohydrate-anchored protein
E) transmembrane