Cholecystokinin and secretin are

Options

A. Hormones liberated by mucosa of duodenum and stimulate gall bladder and pancreas respectively
B. Hormones stimulating liver
C. Hormones stimulating pancreas
D. Enzymes

Explanation

**Step-by-Step Solution:**

1. **Identify the Hormones**: The question asks about Cholecystokinin and Secretin. Both of these are hormones involved in the digestive process.

2. **Source of Hormones**: Both Cholecystokinin and Secretin are secreted by the mucosa of the duodenum, which is the first part of the small intestine.

3. **Function of Cholecystokinin**: Cholecystokinin (CCK) primarily stimulates the gallbladder to contract and release bile. Bile is essential for the emulsification of fats, which aids in their digestion.

4. **Function of Secretin**: Secretin, on the other hand, stimulates the pancreas to release pancreatic juice. This juice contains digestive enzymes that help in the breakdown of carbohydrates, proteins, and fats.

5. **Conclusion**: Therefore, Cholecystokinin and Secretin are hormones that play crucial roles in digestion by stimulating the gallbladder and pancreas, respectively.

6. **Final Answer**: Cholecystokinin and Secretin are hormones liberated by the mucosa of the duodenum that stimulate the gallbladder and pancreas, respectively.

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