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: Medicine
Features of diabetic nonproliferative retinopathy are a) Hard exudatesb) Soft exudatesc) Microaneurysms d) RD 
Select and explain. 
A. ab, B. bc, C. ac, D. ad
B: bc
Answer: B: bc 
Explanation: None