Dental Incompetent lips refer to: A Inability of the lips to cover the incisors in the mandibular relaxed position B Inability of the lips to cover the incisors in occlusion C The lips come in between the upper and lower incisors D Tongue thrusts against the lips during swallowing 💡 Explanation Incompetent lips refer to: ✓ Correct Answer: A. Inability of the lips to cover the incisors in the mandibular relaxed position