Using the Ramachandran Plot Below, Identify the Secondary Structure Adopted $\alpha$

Multiple Choice

Using the Ramachandran plot below, identify the secondary structure adopted by an amino acid with phi and psi angles of -90 and 60 degrees, respectively.

A) right-handed $\alpha$ helix
B) left-handed $\alpha$ helix
C) $\beta$ sheet
D) twisted $\beta$ sheets
E) Amino acids will not adopt this conformation.