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
Nasal septal perforation is characteristically seen in -a) Wegener's granulomatosisb) Polymorphic reticulosisc) Sarcoidosisd) Tuberculosis 
Select and explain. 
A. acd, B. ad, C. bc, D. bde
A: acd
Answer: A: acd 
Explanation: None