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
The most common ocular motility problem in thyroid myopathy is due to involvement of : 
Select and explain. 
A. Medial rectus, B. Superior rectus, C. Inferior rectus, D. Inferior oblique
C: Inferior rectus
Answer: C: Inferior rectus 
Explanation: C i.e. Inferior rectus In thyroid eye disease, the ocular motality defects due to restrictive myopathy (in order of frequency) are -elevation (due to fibrosis of inferior rectus) Q, abduction (due to fibrosis of medial rectus), depression (due to fibrosis of superior rectus) & adduction (due to fibrosis of lateral rectus).