One of the following movements is not completely involuntary. It is

Peristalsis

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Sneezing

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Dilation of pupil

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Deglutition

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Solution

The correct option is C Deglutition
Deglutition is the act or process of swallowing. There are three stages involved in this process, oral stage, pharyngeal stage, and esophageal stage.
The oral stage is voluntary in nature. The muscles are involved in mastication and the tongue helps in pushing the small ball in the throat region.
Thus, the correct answer is option (A)

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