Consider the given two statements:

I. Any exposure to extreme stresses can disrupt a protein's interaction and inevitably lead to denaturation.
II. Protein folding consists of a balance between a substantial amount of weak intra-molecular interactions within a protein.

1. Both I and II are correct and II explains I
2. Both I and II are correct but II does not explain I
3. I is correct and II is incorrect
4. Both I and II are incorrect

Shown below is a level of structural organization of a protein. Which of the following proteins attains its final form as this structure?