Question

Clusters of neuron cell bodies embedded in the white matter of the brain are referred to as:
A. Nuclei
B. Gyri
C. Suici
D. Ganglia

Answer 1

Hint:
Neurons, like other cells, have a cell body (referred to as soma). The nucleus of the neuron is found in the soma. Neurons need to generate lots of proteins, and most neuronal proteins are synthesised in the soma as well. Different processes (protrusions or appendages) extend from the cell body.

Complete answer:
In neuroanatomy, a nucleus is a brain structure that is composed of a compact cluster of neurons. It is one of the two most common types of nerve cell organisation along with layered structures like the cerebellar cortex or cerebral cortex. In anatomical sections, a nucleus appears like a region of Gray matter frequently bordered by white matter. The vertebrate brain comprises hundreds of different nuclei that vary widely in size and shape. A nucleus may itself have a complicated internal structure, with several types of neurons arranged in clumps (subnuclei) or layers.
Additionally, the term nucleus may point to a distinct group of neurons that spread across an extended area. For instance, the reticular nucleus of the thalamus is a thin layer of inhibitory neurons surrounding the thalamus.
In the peripheral nervous system, a cluster of neurons is known as a ganglion. One exception is the basal ganglia, situated not in the periphery but rather in the forebrain. Ganglia are composed mostly of dendritic structures and neuron cell bodies (somata). They are the intermediary connections between the central and peripheral nervous systems.
Folding of the cerebral cortex leads to the formation of sulci and gyri. These folds isolate brain areas and improve the surface area and the cognitive skills of the brain. Gyri and sulci establish borders within and among the brain's lobes, separating them into two halves.

Option ‘A’ is correct

Note:
Neurons (Nerve cells) are specialised cells that conduct electrical impulses. Most of the cell bodies of neurons are in the ganglia (which lie just outside the spinal cord) of the peripheral nervous system or in the central nervous system (brain and spinal cord).