Globe rupture due to blunt trauma is indicated by -
Blow out fracture
Lens subluxation
Contusion + haemorrhage + low intraocular pressure
Proptosis and decreased mobility of muscle
Actually option 'c' is partially correct and partially incorrect.
Contusion is closed globe injury while globe rupture is an open globe injury.
Low IOP is a good indicator of globe rupture and there may be associated intraocular hemorrhage.