This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Oral cavity & Oesophagus, 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 is difficulty in swallowing. The term odynophagia is used when swallowing causes pain. The latter is more marked in ulcerative and inflammatory lesions of food passages - oral cavity, oropharynx and oesophagus. (Ref: Textbook of diseases of ENT, PL Dhingra, 7th edition, pg no. 393)