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
Fasanella Servat operation is specifically indicated in - 
Select and explain. 
A. Congenital ptosis, B. Steroid induced ptosis, C. Myasthenia gravis, D. Horner's syndrome
D: Horner's syndrome
Answer: D: Horner's syndrome 
Explanation: Fasanella servat procedure is indicated in ptosis due to Horner's syndrome & Frontalis suspension is indicated in Marcus Gunn jaw winking syndrome, blepharophimosis syndrome, total 3rd nerve palsy, aberrant regeneration of 3rd nerve.