The answer is the second one (B): Sense organ.
Explanation for each option:
A. Receptor potential - This term refers to the change in membrane potential in a sensory receptor cell in response to a stimulus. It is not the term for sensory receptors accompanied by accessory tissues.
B. Sense organ - This is the correct answer. A sense organ includes sensory receptors and the accessory tissues that help in the transduction of a stimulus. Examples include the eye, ear, and skin, where the receptors are supported by other structures to facilitate sensory processing.
C. Sensory receptor - This term refers to the cells or structures that detect specific types of stimuli. While they are part of sense organs, the term "sensory receptor" alone does not imply the presence of accessory tissues.
D. Labeled line - This concept refers to the idea that specific pathways in the nervous system are dedicated to transmitting particular types of sensory information. It does not describe sensory receptors with accessory tissues.
In summary, the term "sense organ" best describes sensory receptors accompanied by accessory tissues that facilitate the transduction of a stimulus.