**Core Concept**
The question is testing the understanding of the neural control of respiration, specifically the role of the pons and medulla in regulating breathing. The pons and medulla are part of the brainstem, which plays a crucial role in controlling the autonomic functions of the body, including respiration.

**Why the Correct Answer is Right**
The pons and medulla work together to control respiration by regulating the activity of the diaphragm and other respiratory muscles. The pons contains the pneumotaxic center, which helps to regulate the rate of breathing, while the medulla contains the dorsal respiratory group, which is responsible for the inspiratory phase of breathing. When a transaction is made between the pons and medulla, it can disrupt the normal regulation of respiration, leading to abnormal breathing patterns. Specifically, the pneumotaxic center in the pons helps to limit the duration of inspiration, and when this center is damaged, inspiration can become prolonged, leading to **hyperpnea**.

**Why Each Wrong Option is Incorrect**
* **Option A:** A transaction between the pons and medulla would not lead to decreased respiration, as the medulla contains the dorsal respiratory group, which is responsible for the inspiratory phase of breathing.
* **Option B:** A transaction between the pons and medulla would not lead to normal respiration, as the normal regulation of respiration is disrupted.
* **Option D:** A transaction between the pons and medulla would not lead to decreased respiratory rate, as the pneumotaxic center in the pons helps to regulate the rate of breathing.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that damage to the brainstem, including the pons and medulla, can lead to abnormal breathing patterns, including hyperpnea, hypoventilation, and apnea. This is a classic exam trap, and students should be aware of the potential consequences of brainstem damage on respiratory function.

**Correct Answer: C. Hyperpnea**