Surgery General 06923670 In halo sign seen in csf rhinorrhea: A Blood is encircled with csf. B CSF is encircled with blood. C Both are mixed no demarcation. D None of the above. High-Yield Explanation CSF rhinorrhea seen in Lefort 2&3 Naso orbital ethmoid fracture. Cribiform plate fracture. Frontal sinus fracture. Sphenoidal sinus fracture