Stomach in frogs contains

Options

A. Calciferous glands
B. Hepatic caecae
C. Collaterial glands
D. Oxyntic and gastric glands

Explanation

### Step-by-Step Solution:

1. **Identify the Question**: The question asks what the stomach in frogs contains, specifically looking for the types of glands present.

2. **Evaluate the Options**: The options given are:
- A) Calciferous glands
- B) Hepatic CK
- C) Collateral glands
- D) Auxintic and gastric glands

3. **Analyze Each Option**:
- **Option A: Calciferous glands**: These glands are found in earthworms, not frogs. They secrete calcium carbonate to neutralize humic acid from their diet of humus. Thus, this option is incorrect.
- **Option B: Hepatic CK**: These are present in cockroaches and are involved in the secretion of digestive enzymes. They are not found in frogs, making this option incorrect as well.
- **Option C: Collateral glands**: These are also found in cockroaches and are associated with the reproductive system, specifically in females. Therefore, this option is incorrect.
- **Option D: Auxintic and gastric glands**: These glands are present in the stomach of frogs. They secrete hydrochloric acid (HCl) and proteolytic enzymes, which are essential for protein digestion. This makes this option the correct answer.

4. **Conclusion**: The correct answer is that the stomach in frogs contains auxintic and gastric glands.