This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Anatomy
[{'content': 'Investigation of choice for diagnosis of Epilepsy is \nSelect and explain. \nA. EEG, B. CT scan, C. MRI, D. CSF investigations', 'role': 'user'}, {'content': 'Answer: A \nExplanation: All patients who have a possible seizure disorder should be evaluated with an EEG as soon as possible. The EEG is most useful in evaluating patients with suspected epilepsy. The presence of electrographic seizure activity - i.e., abnormal, repetitive, rhythmic activity having an abrupt onset and termination and a characteristic evolution - clearly establishes the diagnosis.', 'role': 'assistant'}]