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: *Distichiasis i.e. an abnormal extra row of cilia taking place of meibomian glands. Ref: Khurana ophthalmology 7th/e p.386