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. **Understanding the Question**: The question asks about the specific glands present in the stomach of frogs.

2. **Analyzing the Options**:
- **Option 1: Calciferous glands**: These glands are found in earthworms, not frogs. They secrete calcium carbonate and are involved in neutralizing humic acid in the earthworm's stomach. Therefore, this option is incorrect.

- **Option 2: Hepatic ck (Hepatic caeca)**: These are found in cockroaches and are responsible for secreting digestive enzymes. Since we are discussing frogs, this option is also incorrect.

- **Option 3: Collateral glands**: These glands are associated with the reproductive system in cockroaches, not in frogs. Hence, this option is incorrect as well.

- **Option 4: Oxynatic and gastric glands**: These are indeed present in the stomach of frogs. The oxynatic glands secrete hydrochloric acid (HCl) and proteolytic enzymes, which are essential for digestion. This option is correct.

3. **Conclusion**: The stomach of frogs contains oxynatic and gastric glands, making option 4 the correct choice.

**Final Answer**: The stomach in frogs contains oxynatic and gastric glands.

---