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
Odynophagia is - 
Select and explain. 
A. Pain during swallowing, B. Difficulty in swallowing, C. Bad odour from mouth, D. Psychiatric disease
A: Pain during swallowing
Answer: A: Pain during swallowing 
Explanation: Dysphagia : - Difficulty in swallowing.
Odynophagia : - Swallowing causes pain.