Answer:
Option b and d
Explanation:
When not part of a polypeptide, amino acids like Arginine and lysine which contains amino acids in active sites of their side chains can potentially take part in hydrogen bonding with water molecules.
Other two amino acids in the options are Alanine and leucine and these are hydrophobic amino acids.
These amino acids contains in their side chains groups that are non-polar and can't take part in hydrogen bonding with water or other polar entities.
