This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Orbit and Adnexa, Subject name: Ophthalmology
First eye muscle affected in thyroid disease 
Select and explain. 
A. Lateral rectus, B. Inferior rectus, C. Medial rectus, D. Superior rectus
B: Inferior rectus
Answer: B: Inferior rectus 
Explanation: Thyroid related ophthalmopathy 5 times more common in female Extra ocular muscles involvement: I - Inferior rectus Am - Medial rectus So - Superior rectus Lucky - Lateral rectus