The correct option is
B Cytoplasm
Ribosomes occur in both prokaryotes and eukaryotes. In eukaryotes, they are of two types: cytoplasmic and organelle ribosomes.
Organelle ribosomes are 70S type. They occur inside mitochondria and plastids. Organelle ribosomes do not occur in prokaryotes. Instead, cytoplasmic ribosomes are 70S type. Cytoplasmic ribosomes of eukaryotes are 80S type. They occur freely or attached to the endoplasmic reticulum (ER).