Most common lesion of the mandible is-
"Ameloblastoma is the most common jaw tumour" -- Radiology of head & Neck
"Ameloblastoma is the most common tumour of the maxillomandibular region. The mandible is affected in 75% of cases, the maxilla in 25%". -- Oral pathology
Ameloblastoma
Squamous cell ca
Osteosarcoma
Osteoclastoma