This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Oral Cavity, Subject name: ENT
Most common type of oesophageal cancer is: 
Select and explain. 
A. Squamous cell carcinoma, B. Adenocarcinoma, C. Adenoid cystic carcinoma, D. Mucoepidermoid carcinoma
A: Squamous cell carcinoma
Answer: A: Squamous cell carcinoma 
Explanation: Approximately 90% of oesophageal cancers are squamous cell type and the remaining adenocarcinomas, adenoid cystic carcinoma, lymphomas and others.Risk factors for oesophageal cancer are:(i) . Alcohol and tobacco abuse(ii) . Achalasia cardia(iii) . Plummer-Vinson syndrome(iv) . Tylosis (palmar and plantar keratoderma)(v) . Chronic stricture(vi) . Barrett's oesophagus.