The correct answer is c) chloroplasts.
Chloroplasts are the organelles found in plant cells and some algae that are responsible for photosynthesis. They contain thylakoids, which are membrane-bound structures where the light-dependent reactions of photosynthesis occur. Within chloroplasts, there is also DNA, which is distinct from the nuclear DNA, and ribosomes that help in the synthesis of proteins necessary for the chloroplast’s function.
In contrast, mitochondria, while they do contain DNA and ribosomes, do not have thylakoids. The nuclei contain the cell’s genetic material but lack thylakoids and ribosomes. Lysosomes are involved in digestion and do not contain these components either. Therefore, the presence of thylakoids, DNA, and ribosomes uniquely identifies chloroplasts in the context of the options provided.