The correct answer is d) phospholipids.
Lysosomes are cellular organelles that contain enzymes capable of breaking down various biomolecules. They primarily digest proteins, nucleic acids, and polysaccharides through hydrolysis. However, phospholipids, which are a major component of cell membranes, are not typically digested by lysosomal enzymes. Instead, they are processed in other parts of the cell, such as the endoplasmic reticulum and mitochondria, for membrane synthesis and energy production. Thus, while lysosomes play a crucial role in breaking down many types of macromolecules, they do not effectively digest phospholipids.