<prompt> Distichiasis is characterised by all of the following except:An extra row of cilia is presentNormal row of cilia is present anterior to the openings of the meibomian glandsExtra row of cilia occupies a position posterior to the openings of the meibomian glandsCilia of the extra row may rub the cornea  <response>: Ans. Extra row of cilia occupies a position posterior to the openings of the meibomian glands 