One of the following is correct statement

Options

A. 1)`T_(4)` is more active than `T_(3)`
B. 2)`T_(3)` is more active than `T_(4)`
C. 3)`T_(3)` and `T_(4)` are the same
D. 4)None of the above

Answer

To solve the question, we need to analyze the statements regarding the thyroid hormones T3 and T4 and determine which one is correct. Here’s the step-by-step solution:

### Step 1: Understand the Hormones
- T3 (triiodothyronine) and T4 (thyroxine or tetraiodothyronine) are hormones produced by the thyroid gland.
- T4 is the primary hormone secreted by the thyroid gland, while T3 is derived from T4.

### Step 2: Analyze the Statements
1. **T4 is more active than T3.**
- This statement is incorrect because T4 is generally considered to be less active than T3.

2. **T3 is more active than T4.**
- This statement is correct. T3 is the active form of thyroid hormone and is more potent than T4.

3. **T3 and T4 are the same.**
- This statement is incorrect. T3 and T4 are different hormones with different structures and functions.

4. **None of the above.**
- This statement is also incorrect because we have already identified that the second statement is correct.

### Step 3: Conclusion
- The correct statement among the options provided is: **T3 is more active than T4.**

### Final Answer
The correct statement is: **T3 is more active than T4.**

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