This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Ophthalmology
All are true about congenital ptosis except 
Select and explain. 
A. Stimulus deprivation amblyopia may occur if treatment is delayed, B. Lid lag on downgaze, C. Prominence of lid crease, D. Loss of lid crease
C: Prominence of lid crease
Answer: C: Prominence of lid crease 
Explanation: Answer- C. Prominence of lid creasePtosis is drooping ofupper eyelid.Congenital myogenis ptosis-It is the most common type of ptosis.Associated with congenital weakness of levator palpebrae sperioris.Characterised by drooping of eye lids with absent lid crese and lid lag on downgaze.