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
Which type of senile cataract is notorious for glaucoma formation? 
Select and explain. 
A. Incipient cataract, B. Hypermature morgagni, C. Intumescent cataract, D. Nuclear cataract
C: Intumescent cataract
Answer: C: Intumescent cataract 
Explanation: In intumescent cataract, the lens may take up fluid during cataractous change, increasing markedly in size. It may then encroach upon the anterior chamber, producing both pupillary block and angle crowding and resulting in acute angle closure. Treatment consists of lens extraction once the intraocular pressure has been controlled medically. Ref: Salmon J.F. (2011). Chapter 11. Glaucoma. In P. Riordan-Eva, E.T. Cunningham, Jr. (Eds), Vaughan & Asbury's General Ophthalmology, 18e.