A 55 year old female comes to the eye casualty with history of severe eye pain, redness and diminution of vision.On examination the visual activity is 6/60, there is circumcorneal congestion, corneal oedema and a shallow anterior chamber, which of the following is the best drug of choice -

• A. Atropine ointment
• B. I.V. Mannitol
• C. Ciprofloxacin eye drops
• D. Betamethasone eye drops