Which of the Following Has (Have)both a Favorable Hydrogen Bonding $\phi$

Multiple Choice

Which of the following has (have) both a favorable hydrogen bonding pattern and $\phi$ and $\varPsi$ values that fall within the allowed Ramachandran conformational regions?

A) " $\alpha$ helix"
B) "collagen helix"
C) " $\beta$ sheet"
D) "all of the above"
E) "none of the above"