ENT Ohngren’s classification of maxillary sinus carcinoma is based on A Imaginary plane between medial canthus of eye and angle of mandible B Imaginary plane between lateral canthus of eye and angle of mandible C Two horizontal lines, one passing through floor of orbit and other through floor of antrum D None 💡 Explanation Ohngren's classification of maxillary sinus carcinoma is based on ✓ Correct Answer: A. Imaginary plane between medial canthus of eye and angle of mandible