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
[{'content': 'Distichiasis is - \nSelect and explain. \nA. Abnormal inversion of eyelashes, B. Abnormal extra row of cilia, C. Abnormal eversion of eyelashes, D. Misdirected cilia', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Congenital anomaly in which an extra row of cilia occupies the position of meibomian gland .Distichiasis is a rare disorder defined as the abnormal growth of lashes from the orifices of the meibomian glands on the posterior lamella of the tarsal plate Ref :Ak khurana 6th edition REF IMG', 'role': 'assistant'}]