This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Lacrimal Apparatus and Eyelid Disorders, Subject name: Ophthalmology
[{'content': 'Not true regarding meibomian glands \nSelect and explain. \nA. Arranged veically, B. More in upper lid than in lower lid, C. Modified sebaceous glands, D. Open in follicles of eyelashes', 'role': 'user'}, {'content': 'Answer: D \nExplanation: * Meibomian glands open in eyelid margins Meibomian glands Arranged veically More in upper lid than in lower lid Modified sebaceous glands Open in eyelid margins Constitute the oily layer of tear film Internal Hordeolum is the infection of meibomian gland', 'role': 'assistant'}]