###Rationale: C i.e. After concussion trauma Blunt trauma to eye may produce Berlin's edema or commotio retinae Q which is a cloudy swelling characterized by a grey appaerance, most frequently in the temporal region. It may also manifest as cherry red spot in the foveal region.

###Answer: OPTION C IS CORRECT.
###Question: In which of the following conditions Berlin's edema is
###Options:
A. Open angle glaucoma
B. After cataract surgery
C. After concussional trauma
D. Diabetic retinopathy
