# The linkage which binds various amino acids in secondary structure of proteins is

$\begin {array} {1 1} (A)\;\text{Glycoside linkage} & \quad (B)\;\text{Peptide linkage} \\ (C)\;\text{Ionic linkage } & \quad (D)\;\text{Hydrogen bond} \end {array}$

The peptide linkage is formed between amino groups of one amino acid with $COOH$ group of another for e.g.,
Ans : (B)