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
Premalignant conditions for carcinoma larynx would include: -a) Leukoplakiab) Lichen planus c) Papillomasd) Smokinge) Chronic laryngitis 
Select and explain. 
A. a, B. bc, C. ad, D. ace
D: ace
Answer: D: ace 
Explanation: None