Question

Regarding the assertion and reason; choose the correct option.
Assertion [A]: Muscular contraction in the alimentary canal is called peristalsis.
Reason [R]: Deglutition has three phases - (Oral phase, Pharyngeal phase and Esophageal phase).

• A. Assertion [A] is True and Reason [R] is False.
• B. Reason [R] is True and Assertion [A] is False.
• C. Assertion [A] is True and Reason [R] is True, and [R] is a correct explanation to [A].
• D. Assertion [A] is True and Reason [R] is True, but [R] is not a correct explanation to [A].

Answer 1

The correct option is D

Assertion [A] is True and Reason [R] is True, but [R] is not a correct explanation to [A].

Deglutition is the swallowing process of food. It has three phases like oral phase, pharyngeal phase and esophageal phase. In context of the first two phases they are voluntary but in the case of the third phase, it is called peristalsis and is an involuntary function occurring by rhythmic muscular contraction of alimentary canal under the control of spinal cord