Pick out the odd one from among the following compouns on the basis of their medicinal properties mentioning the reasons :
Luminal , seconal , phenacetin , equanil.

Explanation

To solve the question of identifying the odd one out among the compounds Luminal, Seconal, Phenacetin, and Equanil based on their medicinal properties, we can follow these steps:

### Step 1: Identify the compounds and their medicinal properties
- **Luminal**: This is a barbiturate that is primarily used as a sedative and hypnotic. It helps in inducing sleep and is often prescribed for insomnia.
- **Seconal**: Similar to Luminal, Seconal is also a barbiturate used as a sedative and hypnotic. It is used to treat insomnia and anxiety.
- **Phenacetin**: This compound is an analgesic and antipyretic. It is used to relieve pain and reduce fever.
- **Equanil**: This is a tranquilizer used to treat anxiety and insomnia. It is not a barbiturate but has similar sedative properties.

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