<prompt> Hallmark feature of osteomyelitis is:Identification of sequestrumPainSwellingNone of the above  <response>: The hallmark of osteomyelitis is the development of sequestra. A sequestrum is a segment of bone that has become necrotic because of ischemic injury caused by the inflammatory process.Reference: White and Pharoahs Oral Radiology Principles and Interpretation 7th edition page no 320 