Non-functional organelles can be broken down and essentially recycled by within the cell.
a. ribosomes
b. lysosomes
c. peroxisomes
d. golgi complexes

Option B. "Lysosomes"

Explanation:

Lysosomes are defined as the organelles that act as cell’s recycling center which dispose and digest unwanted carbohydrates, lipids, protein, RNA, and DNA in the cell, one of the major role of lysosomes in the cell.

Lysosome is acidic from inside that contains many enzymes helps in breaking down unwanted molecules. recycling function is initiated by the procsess called autophagy, which allows the cell digests itself due to under stress and when cell undergoes senescence (growth arrest) to preserve energy with the help of enzymes present in it.

In this way the lysosome engulfs external particles and converts it into useful substances like protein, fat and sugar.

Hence, the correct option is B.