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
%lost radio-resistant cells in retina 
Select and explain. 
A. Retinal pigment epithelium, B. Ganglion cell layer, C. Rods and cones, D. Bipolar cells
B: Ganglion cell layer
Answer: B: Ganglion cell layer 
Explanation: Ans. b. Ganglion cell layer (Ref Radiation Retinopatliv. ,(1991) 5. 239-251)Ganglion cells are an example of highly specialized cells that have undergone extensive maturation, are the most radioresistant cells in the retina.