This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
[{'content': 'Axon hillock is a part of the soma of neuron which \nSelect and explain. \nA. Has dense Nissl granules, B. Has no Nissl granules, C. Is at commencement of dendrites, D. Is round in shape', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]