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What is Odynophagia occurs ina) Achalasiab) Herpes esophagitisc) Monilial esophagitisd) Barret's oesophagus and explain in detail?
Odynophagia means painful swallowing seen in inflammatory lesions of food passage (i.e. oral cavity pharynx & esophagus)
Harrison 16/e writes -

“If odynophagia is present, candidial or herpes esophagitis or pill induced esophagitis should be suspected".

Candidial esophagitis is also known as Monilial esophagitis.