<prompt> An important clinical feature of a concussed tooth is:Tooth is markedly tender to percussionTooth is displaced from the socketEvidence of haemorrhage at gingival marginClinically crown appears shorter  <response>: Concussion Tooth is not displaced.Mobility is not present.Tooth is tender to percussion because of edema and hemorrhage in the periodontal ligament.Pulp may respond normal to testing. 