Which of the Following Best Represents the Backbone Arrangement of Two

Multiple Choice

Which of the following best represents the backbone arrangement of two peptide bonds?

A) C _$\alpha$ -N-C _$\alpha$ -C-C _$\alpha$ -N-C _$\alpha$ -C
B) C _$\alpha$ -N-C-C-N-C _$\alpha$
C) C-N-C _$\alpha$ -C _$\alpha$ -C-N
D) C _$\alpha$ -C-N-C _$\alpha$ -C-N
E) C _$\alpha$ -C _$\alpha$ -C-N-C _$\alpha$ -C _$\alpha$ -C