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Standard XII
Biology
Question

Which one of the following depresses brain activity and produces feelings of calmness, relaxation and drowsiness?
  1. Valium
  2. Morphine
  3. Amphetamines
  4. Hashish

A
Amphetamines
B
Morphine
C
Hashish
D
Valium
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Solution
Verified by Toppr

Morphine is the main opium alkaloid that depresses respiratory centre and contributes to the fall in blood pressure.
Valium is a benzodiazepine (sedative) that gives a feeling of relaxation, calmness or drowsiness in the body.
Amphetamines are synthetic drugs and are stimulated in nature.
Hashish is hallucinogen.
Therefore, the correct answer is option B.

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