Which of the following options correctly idenifies the effect of sympathetic and parasympathetic neural system on given features or organs ?

Options

A. `{:("Feature/organ","Sympathetic neural system","Parasympathetic neural system"),("Salivary glands","Stimulates secretion","Inhibits secretion"):}`
B. `{:("Feature/organ","Sympathetic neural system","Parasympathetic neural system"),("Pupil of the eye","Dilates","Constricts"):}`
C. `{:("Feature/organ","Sympathetic neural system","Parasympathetic neural system"),("Heart rate","Decreases","Increases"):}`
D. `{:("Feature/organ","Sympathetic neural system","Parasympathetic neural system"),("Intestinal peristalsis","Stimulates ","Inhibits "):}`

Explanation

To solve the question about the effects of the sympathetic and parasympathetic nervous systems on various organs, we will analyze each organ or feature mentioned in the question and determine the correct effects of both systems.

### Step-by-Step Solution:

1. **Understanding the Autonomic Nervous System (ANS)**:
- The ANS is divided into two main parts: the sympathetic nervous system (SNS) and the parasympathetic nervous system (PNS).
- The SNS is responsible for the "fight or flight" response, which prepares the body for stressful situations.
- The PNS is responsible for "rest and digest" functions, promoting a state of calm and conserving energy.

2. **Analyzing Each Organ/Feature**:
- **Salivary Glands**:
- SNS: Inhibits secretion (dry mouth during stress).
- PNS: Stimulates secretion (promotes digestion).
- **Conclusion**: The statement that SNS stimulates and PNS inhibits is incorrect.

- **Pupil of the Eye**:
- SNS: Dilates the pupil (to take in more light during danger).
- PNS: Constricts the pupil (to protect the eye and focus on near objects).
- **Conclusion**: The statement that SNS dilates and PNS constricts is correct.

- **Heart Rate**:
- SNS: Increases heart rate (to pump more blood during stress).
- PNS: Decreases heart rate (to promote relaxation).
- **Conclusion**: The statement that SNS decreases and PNS increases heart rate is incorrect.

- **Intestinal Peristalsis**:
- SNS: Inhibits peristalsis (slows down digestion during stress).
- PNS: Stimulates peristalsis (promotes digestion).
- **Conclusion**: The statement that SNS stimulates and PNS inhibits is incorrect.

3. **Final Evaluation**:
- The only correct match from the options provided is for the pupil of the eye, where the SNS dilates and the PNS constricts.

### Answer:
The correct identification of the effects of the sympathetic and parasympathetic nervous systems on the given features or organs is:
- **Pupil of the Eye**: SNS dilates, PNS constricts (Correct).