This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vitreous Humour, Uveal Disorders, Subject name: Ophthalmology
On measuring 3.5 to 4 mm posterior to the limbus in a phakic eye and plunging a 30 gauge needle perpendicular to sclera, you pass through 
Select and explain. 
A. Tenon's capsule, B. Pars plana, C. Ora serrata, D. Zonules
B: Pars plana
Answer: B: Pars plana 
Explanation: Intravitreal injections are given using 30G needle Piercing Pars Plana which is introduced at : In Phakic eye - .5mm from limbus Pseudo-Phakic eye- 4mm from limbus Aphakic eye - .5mm from limbus