Gastro-intestinal hormone that stimulates insulin secretion is
(a) Gastrin
(b) Secretin
(c) GIP
(d) CCK

Options

A. Gastrin
B. Secretin
C. GIP
D. CCK

Answer

To solve the question regarding which gastrointestinal hormone stimulates insulin secretion, we will analyze each of the given options:

1. **Understanding the Question**: We need to identify which hormone among the options provided stimulates the secretion of insulin.

2. **Analyzing Option A - Gastrin**:
- Gastrin is a hormone that primarily stimulates the secretion of gastric juices and hydrochloric acid (HCl) in the stomach.
- Since its main function is related to gastric activity and not insulin secretion, **this option is incorrect**.

3. **Analyzing Option B - Secretin**:
- Secretin is a hormone that stimulates the pancreas to secrete bicarbonate, which helps neutralize stomach acid in the small intestine.
- While it plays a role in digestion, it does not directly stimulate insulin secretion, making **this option incorrect**.

4. **Analyzing Option C - GIP (Gastric Inhibitory Polypeptide)**:
- GIP is known for its role in the digestive system, particularly in stimulating insulin secretion in response to food intake.
- This hormone is specifically involved in the regulation of insulin, making **this option correct**.

5. **Analyzing Option D - CCK (Cholecystokinin)**:
- CCK is a hormone that stimulates the secretion of digestive enzymes from the pancreas and bile from the gallbladder.
- Although it is important for digestion, it does not have a direct role in stimulating insulin secretion, thus **this option is incorrect**.

6. **Conclusion**: Based on the analysis, the gastrointestinal hormone that stimulates insulin secretion is **(c) GIP**.

### Summary of the Correct Answer:
The correct answer is **(c) GIP** (Gastric Inhibitory Polypeptide).