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
Muscle mostly affected in thyroid ophthalmopathy is: 
Select and explain. 
A. Lateral rectus, B. Inferior rectus, C. Superior rectus, D. Medial rectus
B: Inferior rectus
Answer: B: Inferior rectus 
Explanation: Ans. Inferior rectus