This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urology, Subject name: Surgery
A 40 Year old female patient presented with dysphagia to both liquids and solids and regurgitation for 3 months. The dysphagia was non-progressive. What is the most likely diagnosis 
Select and explain. 
A. Carcinoma of the esophagus, B. Lower esophageal mucosal ring, C. Achalasia cardia, D. Reflux esophagitis with esophageal stricture
C: Achalasia cardia
Answer: C: Achalasia cardia 
Explanation: .Clinical Features of achalasia cardia includes * Common in females between 20 and 40 years age group. * Chest pain occurs in early stage. * Achalasia with diffuse oesophageal spasm is called as 'vigorous achalasia'. * Presents with progressive dysphagia, which is more for liquid than to solid food. * Regurgitation and recurrent pneumonia are common (10%). * Malnutrition and general ill health. * Lung abscess formation. * Odynophagia and weight loss. ref:SRB&;s manual of surgery,ed 3,pg no 729