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प्रश्न
______ gas cylinders are used for breathing purpose for a diver going deep into the sea.
विकल्प
Hydrogen
Carbon-di-oxide
Oxygen
Nitrogen
MCQ
रिक्त स्थान भरें
उत्तर
Oxygen gas cylinders are used for breathing purpose for a diver going deep into the sea.
shaalaa.com
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