The correct option is C.
The site of protein synthesis in a cell is RIBOSOME.
Protein synthesis in the cell takes place in two steps, the transcription step and the translation step. The transcription step takes place in the nucleus and it involves the encoding of the genetic information in the DNA molecule into the mRNA molecule. After transcription, the mRNA moves out of the nucleus into the cytoplasm and move to the ribosome, where the translation part of the protein synthesis will take place.
