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
Of the following conditions most painful is: 
Select and explain. 
A. Stye, B. Hordeolum internum, C. Ulcerative blepharitis, D. Inflammation of gland of Moll
B: Hordeolum internum
Answer: B: Hordeolum internum 
Explanation: Ans. Hordeolum internum