This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Glaucoma, Subject name: Ophthalmology
Triple surgery in glaucoma includes all of the following except 
Select and explain. 
A. Trabeculectomy, B. PCIOL implantation, C. Inseion of drainage device, D. Extra capsular cataract extraction
C: Inseion of drainage device
Answer: C: Inseion of drainage device 
Explanation: (Refer: AK Khurana Comprehensive Ophthalmology, 6th edition, pg no. 253)Triple Procedure for Glaucoma:TRABECULECTOMYECCEPCIOL INSEION