This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Diseases of orbit, Lids and lacrimal apparatus, 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: *Order of involvement (Mnemonic : IM SLO):- Inferior rectus > medial rectus > superior rectus > Laterial rectus > oblique. Ref: Head & Neck Surgery 2nd/e p.1513