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
Which of the following agents is not used in the treatment of Diabetic Macular Edema/ Retinopathy: 
Select and explain. 
A. Ruboxistaurim, B. Pyridazinones, C. Benfotiamine, D. Tamoxifen
D: Tamoxifen
Answer: D: Tamoxifen 
Explanation: Ans. Tamoxifen