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
True statement about dysthyroid eye disease (grave's ophthalmopathy) is - 
Select and explain. 
A. Decreased power of divergence, B. Most common cause of unilateral proptosis in < 25 years age group, C. Extreme exopthalmos is usually seen in hypothyroidism, D. On looking upwards lower lid does not follow eye movements
C: Extreme exopthalmos is usually seen in hypothyroidism
Answer: C: Extreme exopthalmos is usually seen in hypothyroidism 
Explanation: Extreme exophthalmos :- In hypothyroidism
Mild exophthalmos :- In hyperthyroidism (thyrotoxicosis , Grave's disease).