Which one of the following depresses brain activity and produces feelings of calmness, relaxation and drowsiness?

Options

A. morphine
B. valium
C. amphetamines
D. hashish

Answer

**Step-by-Step Solution:**

1. **Identify the Question**: The question asks which substance depresses brain activity and produces feelings of calmness, relaxation, and drowsiness.

2. **Understand the Effects**: The effects mentioned in the question are associated with sedative drugs. These drugs typically slow down brain activity and can induce feelings of calmness and relaxation.

3. **Recall Sedative Drugs**: One well-known class of sedative drugs is benzodiazepines. These are commonly prescribed for anxiety, insomnia, and other conditions that require sedation.

4. **Identify a Specific Drug**: Among the benzodiazepines, one of the most recognized is Valium, which is the brand name for diazepam. Valium is known for its calming effects and is often used to treat anxiety and muscle spasms.

5. **Conclude the Answer**: Based on the information about sedative drugs and the specific effects mentioned, the answer to the question is Valium.

**Final Answer**: Valium

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