Hormone containing only ketonic functional group is

Options

A. Estradiol
B. Progesterone
C. Testosterone
D. Insulin

Answer

To determine which hormone contains only a ketonic functional group, we will analyze the given options: estradiol, progesterone, testosterone, and insulin.

### Step-by-Step Solution:

1. **Understanding Ketonic Functional Group**:
- A ketone is characterized by a carbonyl group (C=O) that is bonded to two other carbon atoms. This means that for a compound to be classified as a ketone, it must have this specific functional group without any other functional groups like hydroxyl (-OH) or aldehyde (-CHO).

2. **Analyzing the Hormones**:
- **Estradiol**: This is a steroid hormone that contains multiple functional groups, including hydroxyl groups. Therefore, it does not contain only a ketonic functional group.
- **Progesterone**: This is another steroid hormone that has both a ketone and a hydroxyl group. Thus, it also does not contain only a ketonic functional group.
- **Testosterone**: This is a steroid hormone that has a ketonic functional group and does not have any other functional groups like hydroxyl or aldehyde. Therefore, it qualifies as a hormone containing only a ketonic functional group.
- **Insulin**: This is a protein hormone and does not contain a ketonic functional group.

3. **Conclusion**:
- Based on the analysis, the hormone that contains only a ketonic functional group is **Testosterone**.

### Final Answer:
The hormone containing only a ketonic functional group is **Testosterone**.

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