Your patient in ED with a head injury develops rhinorrhea. You quickly grab a 4x4 gauze to test the drainage. When you observe the drainage on the gauze, which of the following would indicate a positive Halo sign?

Blood will cover the whole gauze

There will be a circle of blood in the center of gauze with a yellow ring around it

There will be a greenish color fluid present on the gauze

There will be multiple circles of blood noted on the gauze