Blinking of eyelids, coughing , swimming, sneezing pick the odd one out and mention the category

Dear student,
Please find below the answer:

The odd one out is swimming. The other three are reflex actions or involuntary actions.
Reflex action is an involuntary action produced in response to external stimuli. Sneezing, coughing and blinking are involuntary actions.
                                         
Hope this information clears your doubt.
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