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
Tear drops formed by all except ? 
Select and explain. 
A. Glands of Manz, B. Meibomian, Zeis and Moll glands, C. Lacrimal glands, D. Lacrimal puncta
D: Lacrimal puncta
Answer: D: Lacrimal puncta 
Explanation: Ans. is 'd' i.e., Lacrimal puncta The major function of lacrimal apparatus is to secrete and drain the tear. Tear film consists of 3 layers :? Mucous or mucin layer (innermost):- Secreted by conjunctival goblet cells, crypts of Henle, glands of Manz. Aqueous layer (intermediate) :- This forms the bulk of the tear. It is secreted by main lacrimal and accessory lacrimal glands. Lipid layer (outermost) :- Secreted by the Meibomion Zeis, and Moll glands.