Question

Regrading Assertion (A) and Reason (R), select the right option
(A) Cardiac sphincter prevents regurgitation.
(R) It prevents re-entry of food from small intestine to stomach.

• A. If both (A) and (R) are true and (R) is the correct explanation of (A)
• B. If both (A) and (R) are true but (R) is not the correct explanation of (A)
• C. If (A) is true, but (R) is false
• D. If (A) and (R) are false

Answer 1

The correct option is C If (A) is true, but (R) is false

A sphincter is a circular muscle that normally maintains constriction of a natural body passage . The lower oesophageal sphincter (or cardiac sphincter), which resides at the top of the stomach. This sphincter prevents the acidic contents of the stomach from moving upward into the oesophagus.