Assertion A: Acid reflux occurs when acid in the stomach flows back to the chest or throat. Reason R: Prolonged periods without food lead to the accumulation of acid in the stomach.
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assertion and reason
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Acid reflux is caused by weakness or relaxation of the lower esophageal sphincter (valve). Normally this valve closes tightly after food enters your stomach. If it relaxes when it shouldn't, your stomach contents rise back up into the esophagus. Stomach acids flow back up into the esophagus, causing reflux
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