###Rationale: Cavernous sinus thrombosis *Patient develops severe pain in the eye and forehead of the involved side. *Conjunctiva is swollen and congested. *Proptosis *Ptosis (due to 3rd N.Palsy) *Dilated pupil (due to 3rd N involvement ) *Retinal veins shows congestion. *Papilloedema *Fundus may be normal Ref: Khurana 7th/e p.428

###Answer: OPTION A IS CORRECT.
###Question: All the following signs could result from infection with in the right cavernous sinus except-
###Options:
A. Constricted pupil in response to light
B. Engorgement of the retinal veins upon ophthalmoscopic examination
C. Ptosis of the right eyelid
D. Right ophthalmoplegia
