In which of the following condition, cattle truck appearance is seen: (AIPG 2011)
1. Central Retinal Artery OcclusionQis characterised by sudden painless loss of vision.
2. Retinal arteries look thread like.
3. Retina becomes edematous (milky white) and a cherry red spot is seen.
4. If the obstruction is incomplete, and a slight pressure is applied on globe, the RBCs move in a jerky way through the vessels (cattle trunk appearance).