Which of the following maintains constant sugar level in blood ?

Options

A. Gibberlins
B. Insulin
C. Glucogen
D. Estrone

Answer

To solve the question "Which of the following maintains constant sugar level in blood?" we will analyze the options provided.

### Step-by-Step Solution:

1. **Understanding the Question:**
- The question asks which substance maintains a constant sugar level in the blood. This is related to the regulation of blood glucose levels.

2. **Analyzing the Options:**
- The options given are:
- A) Gibrilins
- B) Insulin
- C) Glucogen
- D) Estrone

3. **Identifying the Function of Each Option:**
- **Gibrilins:** These are plant hormones that promote growth and are not involved in blood sugar regulation in humans.
- **Insulin:** This is a hormone produced by the pancreas that helps regulate blood sugar levels by facilitating the uptake of glucose into cells and lowering blood sugar levels.
- **Glucogen:** This seems to be a typographical error for "glucagon," which is a hormone that raises blood sugar levels by promoting the conversion of glycogen to glucose in the liver.
- **Estrone:** This is a form of estrogen, a hormone involved in the regulation of the female reproductive system, and does not play a role in blood sugar regulation.

4. **Conclusion:**
- Based on the functions of the hormones analyzed, **Insulin** is the hormone that maintains a constant sugar level in the blood by lowering blood sugar levels when they are high.

Therefore, the correct answer is **B) Insulin**.