<prompt> Ring sequestrum is seen inTyphoid osteomyelitisChronic osteomyelitisAmputation stumpTuberculosis osteomyelitis  <response>: C i.e. Amputation Stump Excessive periosteal stripping is contraindicated as it may result in formation of ring sequestrum in amputation stumpQType of Sequestrum Found InRing sequestrum - Amputation stumpsQ - Around pin tracks external fixatorTubular sequestrum - Hematogenous osteomyelitis - Segmental fractures middle segmentRice grain sequestrum - Tuberculosis 