Answer:
A. Cell body
Step-by-step explanation:
The cell body of a neuron is also called soma and have a nucleus and cytoplasm. The cytoplasm of the cell body contains organelles such as mitochondria, lysosomes, etc.
Nissl bodies are the structures present in the cytoplasm of the cell body. The Nissl bodies consist of ribosomes and RER (rough endoplasmic reticulum). Since the cell body has RER and ribosomes, it serves as a site for protein synthesis in neurons.