This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ocular motility and squint, Subject name: Ophthalmology
[{'content': 'Which of the following best defines the "Saccade"- \nSelect and explain. \nA. Voluntary slow eye movements, B. Involuntary slow eye movement, C. Abrupt, involuntary slow eye movements, D. Abrupt, involuntary rapid eye movements', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Saccades are sudden, jerky conjugate eye movements that occur as the gaze shifts from one object to another. Supranuclear eye movement systems include : Saccadic system Smooth pursuit system Vergence system Vestibular system Optokinetic sysytem Position maintenance system Ref;A.K.Khurana;6th edition; Page no: 341', 'role': 'assistant'}]