The intermediate filaments of a neuron are also called

Neuro filaments

explanation:

Neurofilaments (NF) are intermediate filaments found in the cytoplasm of neurons. Together with microtubules and microfilaments, they form the neuronalcytoskeleton. They are believed to function primarily to provide structural support for axons and to regulate axon diameter, which influences nerve conduction velocity.

i think that c)gold was found there

but i am not sure