In the following options ,each one has a pair of names. They are the same hormone with different names. Which one of these does not follow the rule ?

Options

A. Parathormone - Collip's hormone
B. Tetra- iodotyrosine - thyroxine
C. Prolactin - Lactating hormone
D. Vasopressin - Anti diuretic hormone

Answer

To solve the question, we need to identify which pair of hormone names does not correspond to the same hormone. Here’s a step-by-step breakdown of the solution:

### Step 1: Analyze the First Pair
- **Parathormone and Collapse Hormone**
- Parathormone (also known as parathyroid hormone) is produced by the parathyroid glands and is responsible for increasing blood calcium levels.
- This pair is correct as both names refer to the same hormone.

**Hint:** Check if both names refer to the same hormone and their function.

### Step 2: Analyze the Second Pair
- **Thyroxine and Tetraiodothyrosine**
- Thyroxine (T4) is a hormone produced by the thyroid gland that regulates metabolism.
- The correct scientific name for thyroxine is Tetraiodothyronine, not Tetraiodothyrosine.
- This pair is incorrect because the second name is a misspelling.

**Hint:** Verify the scientific names and their correct spellings.

### Step 3: Analyze the Third Pair
- **Prolactin and Lactating Hormone**
- Prolactin is produced by the pituitary gland and is involved in milk production.
- It is indeed also referred to as the lactating hormone.
- This pair is correct.

**Hint:** Look for alternative names that are commonly accepted for the hormone.

### Step 4: Analyze the Fourth Pair
- **Vasopressin and Antidiuretic Hormone (ADH)**
- Vasopressin is another name for antidiuretic hormone (ADH), which helps in water reabsorption in the kidneys.
- This pair is correct as both names refer to the same hormone.

**Hint:** Confirm if both names are widely recognized synonyms for the hormone.

### Conclusion
The pair that does not follow the rule of being the same hormone with different names is the second pair: **Thyroxine and Tetraiodothyrosine**. The correct name should be Tetraiodothyronine.

### Final Answer
The option that does not follow the rule is the second pair: **Thyroxine and Tetraiodothyrosine**.