unipolar (pseudounipolar)

which of these neurons types is are unipolar

Sensory pathways contains these pseudounipolar neurons and bipolar neurons. The pseudounipolar neurons have dendrites fused with axon and they are for somatic senses. The bipolar neurons have two relatively equal fibres extending off their central cell body and they are for smell & vision.

The afferent nerve of the PNS have the pseudounipolar cells.

No, an association neuron (also known as an interneuron) is not unipolar. Unipolar neurons have a single process extending from the cell body, while association neurons have multiple processes (dendrites and axons). Association neurons are responsible for connecting sensory and motor neurons in the central nervous system.