Multiple choice Which of the following muscles causes wrinkling of the skin of chin? Risorius Depressor anguli oris Depressor labii inferiois Mentalis Reveal answer Fill a bubble to check yourself D Correct answer Explanation It is a paired muscle lying at the lower end of the chin. It causes protrusion of the lower lip and elevates the skin of the chin. As the lower lip is raised, it results in elevation and wrinkling of the skin of chin.