The Hydrogen Bonding Between the Carbonyl Group of an Amino $\beta$

The hydrogen bonding between the carbonyl group of an amino acid with the amino group of the fourth amino acid farther along the chain leads to ______.

A) (parallel $\beta$ -pleated sheets)
B) ( antiparallel $\beta$ -pleated sheets)
C) ( $\alpha$ -helix)
D) ( $\beta$ -helix)
E) none of these