The dorsal root ganglion (drg) lies just outside the interface between the central and peripheral nervous systems, and holds the cell bodies for those neurons that transmit signals between the two. what type of neurons are found in the dorsal root ganglion?

Sensory neuron.

Explanation:

Neuron is the structural and functional unit of the nervous system. Neurons or nerve cell consists of the axon, dendrites, cell body and cytoplasm. Two main types of neuron are sensory neuron and motor neuron.

Sensory neuron carries the transfer of information from the receptor to the coordination center. The dorsal root ganglion has large cell bodies of the sensory neurons. These neurons carry the information from the periphery towards the spinal cord.  

Thus, the answer is sensory neuron.

yes, because even though a theory has a  lot of evidence to support it, it is not always true