Answer: B
Q10.0 is the correct code for this case because it codes for congenital ptosis. Since the drooping is present since birth, it represents congenital ptosis.
Option A is not correct because Q10.1 is used to code for congenital ectropion which is not the diagnosis here.
Option C is not correct because Q10.2 is used to code for congenital entropion which is not the diagnosis here.
Option D is not correct because Q10.3 is used to code for other congenital malformations of eyelid which is not the diagnosis here.