A and B are peptide hormones , known to counteract each other . Both of them are secreted by different cells of the same leaf-like organ found near thee stomach . If B is used to cure a disease in which glucose is lost via urine and excess A is a potential causes of the same diseases , identify A and B

Options

A. A : insulin , B: glucagon
B. A : Somatostatin, B : insulin
C. A : glucagon, B: insulin
D. A: insulin , B : Somatostatin

Answer

To solve the question, we need to identify the two peptide hormones A and B that counteract each other and are secreted by the pancreas, which is the leaf-like organ mentioned in the question.

### Step-by-Step Solution:

1. **Identify the Leaf-like Organ**:
- The question states that A and B are secreted by a leaf-like organ near the stomach. The pancreas is the organ that fits this description as it has a leaf-like shape and is located near the stomach.

**Hint**: The pancreas is the organ responsible for secreting hormones that regulate glucose levels.

2. **Understand the Functions of the Hormones**:
- The question mentions that B is used to cure a disease in which glucose is lost via urine, and excess A can cause the same disease. This indicates that A and B have opposing effects on blood glucose levels.

**Hint**: One hormone increases blood glucose levels while the other decreases it.

3. **Identify the Hormones**:
- The two main hormones produced by the pancreas that regulate blood glucose levels are insulin and glucagon.
- **Insulin**: Lowers blood glucose levels by facilitating the uptake of glucose into cells.
- **Glucagon**: Raises blood glucose levels by promoting the release of glucose from the liver.

**Hint**: Think about which hormone is responsible for lowering blood sugar and which one raises it.

4. **Link to the Disease**:
- The disease mentioned is likely diabetes mellitus, where glucose is lost in urine (a condition known as glucosuria). In diabetes, there is either insufficient insulin (Type 1) or insulin resistance (Type 2), leading to high blood glucose levels.

**Hint**: Excess glucagon can lead to increased blood glucose levels, contributing to diabetes.

5. **Conclusion**:
- Based on the functions and the relationship to the disease, we can conclude:
- **A = Glucagon** (excess can cause diabetes)
- **B = Insulin** (used to treat diabetes)

Therefore, the correct identification is:
- A = Glucagon
- B = Insulin

### Final Answer:
A is Glucagon and B is Insulin.