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
Distichiasis is - 
Select and explain. 
A. Abnormal inversion of eyelashes, B. Abnormal extra row of cilia, C. Abnormal eversion of eyelashes, D. Misdirected cilia
B: Abnormal extra row of cilia
Answer: B: Abnormal extra row of cilia 
Explanation: 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