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
Regarding ambylopia which of the following is true-a) Spectacles should be usedb) T/t with occlusion methodc) Surgery is the TOCd) Idiopathic condition 
Select and explain. 
A. ac, B. ab, C. ad, D. bc
B: ab
Answer: B: ab 
Explanation: None