A patient with history of running nose and pain over medial aspect of the eye presents with sudden onset of high grade fever,prostration,chemosis,proptosis and diplopia on lateral gaze with congestion of the optic disc.Which of the following is the most likely diagnosis

• A. Orbital Cellulitis
• B. Acute ethmoidal sinusitis
• C. Orbital Apex Sundrome
• D. Cavernous Sinus Thrombosis