The same hormone can be known by various names given in which set :

Options

A. Secretin, enterokinih, gastrin
B. Gametokinetic factor, testosterone, LTH
C. ADH, pitressin, and vasopressin
D. Oxytocin, tri-iodo-thyronine, thyroxine

Answer

To solve the question regarding which set contains the same hormone known by various names, we will analyze each option provided.

### Step 1: Analyze the first option
The first option lists the hormones: **secretin, enterokinin, and gastrin**.
- **Secretin** is a hormone that stimulates the pancreas to release bicarbonate.
- **Enterokinin** is involved in the activation of digestive enzymes.
- **Gastrin** stimulates the secretion of gastric acid.

These are all different hormones with distinct functions, so this option is incorrect.

### Step 2: Analyze the second option
The second option lists: **chemitokinetic factor, testosterone, LTH**.
- **Chemitokinetic factor** is related to the movement of cells.
- **Testosterone** is a male sex hormone.
- **LTH** (Luteotropic Hormone) is another name for prolactin, which is involved in milk production.

Again, these are different hormones, so this option is also incorrect.

### Step 3: Analyze the third option
The third option lists: **ADH, vasopressin, and oxytocin**.
- **ADH (Antidiuretic Hormone)** is also known as **vasopressin**, which helps in water reabsorption in the kidneys.
- **Oxytocin** is a hormone that stimulates uterine contractions and milk ejection during breastfeeding.

Here, we see that **ADH and vasopressin** are indeed the same hormone, and they are different from oxytocin. However, the question asks for the same hormone known by various names, and in this case, ADH and vasopressin are the same.

### Step 4: Analyze the fourth option
The fourth option lists: **triiodothyronine and thyroxine**.
- **Triiodothyronine (T3)** and **thyroxine (T4)** are both thyroid hormones but are different in structure and function.

Thus, this option is also incorrect as they are not the same hormone.

### Conclusion
The correct answer is the third option, which contains the same hormone known by different names: **ADH and vasopressin**.

### Summary of the Correct Option
- **ADH (Antidiuretic Hormone)** = **Vasopressin**
- **Oxytocin** is a different hormone.

### Final Answer
The correct set is the third option: **ADH, vasopressin, and oxytocin**.

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