**Core Concept**
Complex tongue thrusting activity refers to an abnormal movement of the tongue during swallowing, characterized by a lateral or protrusive motion. This activity can lead to various oral and dental problems, including malocclusion, tooth wear, and altered speech.

**Why the Correct Answer is Right**
The correct answer is B because the temporoparietalis muscle is not directly involved in the complex tongue thrusting activity. During swallowing, the primary muscles responsible for tongue movement are the genioglossus, hyoglossus, and styloglossus. The temporoparietalis muscle, on the other hand, is a facial muscle that plays a role in facial expressions, such as smiling and frowning.

**Why Each Wrong Option is Incorrect**
**Option A:** Naso-respiratory distress is not directly associated with complex tongue thrusting activity, but it can be a consequence of prolonged abnormal tongue movements. However, it is not a primary factor contributing to this activity.

**Option C:** Contraction of the mentalis and lower lip during swallow can be associated with complex tongue thrusting activity, as these muscles can influence the position and movement of the tongue.

**Option D:** Absence of contact of teeth during swallow is often a result of complex tongue thrusting activity, as the abnormal tongue movement can disrupt the normal occlusal relationship between the upper and lower teeth.

**Clinical Pearl / High-Yield Fact**
A key clinical indicator of complex tongue thrusting activity is the presence of anterior open bite or malocclusion, which can be a result of prolonged abnormal tongue movements during swallowing.

**✓ Correct Answer: B. Contraction of the temporoparietalis muscle.**