This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Ophthalmology
A 33 year old suffers from blunt trauma to the eye. Fundoscopy shows cherry red spot, the probable diagnosis is 
Select and explain. 
A. Retinoblastoma, B. Commotio Retinae, C. Optic nerve transection, D. Posterior Vitreous Detachment
B: Commotio Retinae
Answer: B: Commotio Retinae 
Explanation: Answer- B. Commotio RetinaeBerlin's oedema, also called commotio retinae, occurs in blunt trauma to eye. It manifests as milky white cloudiness involving a considerable area of the posterior pole with a'cherry-red'spot in the foveal region.