A twenty residue peptide composed of the sequence (l - ala)n forms a right handed alpha helix in methanol. if every alternate l- ala residue is replaced with d

A twenty residue peptide composed of the sequence (L - Ala)n forms a right handed alpha helix in methanol. If every alternate L- Ala residue is replaced with D - Ala, the peptide will probably a. form a right handed alpha helix. b. form a left handed alpha helix. C. form ten residues of right handed helix followed by ten residues of a left handed helix. d. not form a helix of any kind. [IISc]