<prompt> Clinical features of Conus Medullaris syndrome include all of the following Except:Plantar ExtensorAbsent knee ankle jerksSacral anesthesiaLower sacral coccygeal involvement  <response>: The root value of Conus medullaris is S1-S5. Hence in conus medullaris syndrome, knee-jerk is preserved but ankle jerk is lost. Due to the involvement of coicospinal pathway, extensor plantars will be seen. 