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The correct option is D Nitrous oxide
Nitrous Oxide or laughing gas is also called laughing gas because it can create a feeling which makes us laugh easily. It is also used as a sedative in dental and medical care. It causes a reduction in the sensation of pain, which can be helpful if you are in need of serious dentistry.
Nitrous Oxide or laughing gas is also called laughing gas because it can create a feeling which makes us laugh easily. It is also used as a sedative in dental and medical care. It causes a reduction in the sensation of pain, which can be helpful if you are in need of serious dentistry.
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