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 Band shaped Keratopathy is 
Select and explain. 
A. Iron deposition in Bowman's membrane, B. Calcium deposition in Descemet's membrane, C. Iron chelating agents are used for treatment, D. Sarcodosis can be a cause
D: Sarcodosis can be a cause
Answer: D: Sarcodosis can be a cause 
Explanation: Bone Shaped Keratopathy

Degeneration disease occuring due to calcium deposition in Bowman's membrane.

Etiology -

Hypercalcemia
Still's disease
Sarcoidosis

Treatment :

Chelation with EDTA