Which Statement Is Correct About the β-α-β Motif

Multiple Choice

Which statement is correct about the β-α-β motif?

A) The 2 β-strands are antiparallel.
B) The peptide segment connecting the β-strands usually contains no more than 5 amino acids.
C) The peptide segment connecting the 2 β-strands commonly contains proline.
D) The crossover connection itself contains an α-helical segment.