This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Orbit, Subject name: Ophthalmology
[{'content': 'A 5-year-old boy presents with Severe ptosis associated with poor levator function. Which of the following will be the treatment? \nSelect and explain. \nA. Frontalis Suspension surgery, B. Levator resection, C. Mullerectomy, D. Fasnella servat operation', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) Frontalis Suspension surgery(Ref: Kanski 8/e, p. 45; Parsons 22/e, p. 464; Yanoff 4/e, p. 1273)Brow (frontalis) suspension is used for severe ptosis (> 4 mm) with very poor levator function (< 4 mm) in simple congenital ptosis or occurring due to 3rd nerve palsy, blepharophimosis syndrome and following unsatisfactory previous LPS resection. The tarsal plate is suspended from the frontalis muscle using a sling made of either fascia lata or silicone/prolene', 'role': 'assistant'}]