###Rationale: Amongst the given options only CRAO causes sudden painless loss of vision along with cherry red spot.

###Answer: OPTION B IS CORRECT.
###Question: An elderly male with heart disease presents with sudden loss of vision in one eye; examination reveals cherry red spot; diagnosis is –
###Options:
A. Central retinal vein occlusion
B. Central retinal artery occlusion
C. Amaurosis fugax
D. Acute ischemic optic neuritis
