Given below is a set of four terms, in which one term is odd and cannot be grouped in the same category to which the other three belong. Identify the odd one and name the category to which the remaining three belong.
Cyton, Photon, Axon, Dendron.
Photon:
Parts of a neuron:
Final answer: The odd term is photon and the category to which the other terms belong to is parts of a neuron.