Multiple choice Hiccups are caused due to ____________. involuntary contraction of the diaphragm convulsive expulsion of air from the lungs forceful sudden expiration uncontrolled cough sore throat Reveal answer Fill a bubble to check yourself A Correct answer Explanation Hiccups are an involuntary spasm of the diaphragm and respiratory organs, with a sudden closure of the glottis and a characteristic gulping sound.