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: ENT
Which of the following is a features of tympanic membrane perforation - 
Select and explain. 
A. Tinnitus, B. Vertigo, C. Conductive deafness, D. Fullness in ear
C: Conductive deafness
Answer: C: Conductive deafness 
Explanation: Tympanic membrane perforation is associated with a conductive hearing loss of 10-40 dB.