The first human hormone produced by recombinant DNA technology is

Options

A. Progesterone
B. Insulin
C. Estrogen
D. Thyroxin

Answer

To solve the question regarding the first human hormone produced by recombinant DNA technology, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks for the first human hormone that was produced using recombinant DNA technology.

2. **Review the Options**: The options provided are:
- 1st Registron
- 2nd Insulin
- 3rd Estrogen
- 4th Thyroxine

3. **Define Recombinant DNA Technology**: This technology involves the insertion of a gene into a genome, allowing for the production of specific proteins or hormones.

4. **Identify the First Human Hormone**: Among the options, we need to identify which hormone was the first to be produced using this technology.

5. **Recall Historical Context**: Insulin was the first human hormone to be produced through recombinant DNA technology. It was developed by the American company Genentech and licensed by Eli Lilly and Company.

6. **Conclude the Answer**: Therefore, the correct answer to the question is **Insulin**.

### Final Answer:
The first human hormone produced by recombinant DNA technology is **Insulin**.

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