Match the phrases I-VI with options A-D below.
I) Final three-dimensional packaging of all three regions of a single polypeptide chain
II) Packing together of two or more adjacent folded sections within a contiguous piece of polypeptidechain (found to occur in many unrelated proteins)
III) Regular three dimensional folding pattern (repeating pi, psi values) of a contiguous segment of polypeptide chain
IV) Binding together and arrangement of separately folded polypeptide chains (subunits)
VI) Globular cluster of noncontiguous segments of polypeptide chain to form a unique, identifiable region of protein