Select the correct statement for the figure given below.

Of course, only some portions of the protein thread are arranged in the form of a helix. In proteins, only right handed helices are observed. Other regions of the protein thread are folded into other forms in what is called the secondary structure (Fig. 9.3 b). In addition, the long protein chain is also folded upon itself like a hollow woollen ball, giving rise to the tertiary structure (Fig.9.3c). This gives us a 3-dimensional view of a protein.