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
Infection of what is called stye- 
Select and explain. 
A. Hair follicles, B. Tarsal gland, C. Conjunctiva, D. Zeis glands
D: Zeis glands
Answer: D: Zeis glands 
Explanation: *Acute infection of Zeis gland -> Style. *Acute infection of tarsal gland -> Hardoleum internum *Chronic infection of tarsal gland -> Chalazion. Ref: Khurana 7th/e p.383