In a neuron, graded electrogenesis occurs at:: (A) Soma-dendritic zone, (B) Initial segment, (C) Axon, (D) Nerve ending
Answer is A. Graded electrogenesis is local potential generation of which occurs in dendrite or, soma.
Neurons generally have some important zones: 

A receptor, or dendritic zone, where multiple local potential generated by synaptic connections are integrated;
A site where propagated action potentials are generated (the initial segment in spinal motor neurons, the initial node of Ranvier in cutaneous sensory neurons).