The correct option is D Ribosomes
Prokaryotic cells lack true nucleus as well as membrane bound organelles. Nucleus and membrane bound organelles are present only in eukaryotic cells. Endoplasmic reticulum (ER), the golgi complex, lysosomes, mitochondria, microbodies and vacuoles, etc. are membrane bound organelles which are present in eukaryotic cells. Ribosomes are non-membrane bound organelles found in both eukaryotic as well as prokaryotic cells.