पृथ्वी के वायुमण्डल में कौन-सी गैस सर्वाधिक मात्रा में पाई जाती है? Which of the following gases is present in large quantities in the atmosphere?

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पृथ्वी के वायुमण्डल में कौन-सी गैस सर्वाधिक मात्रा में पाई जाती है? Which of the following gases is present in large quantities in the atmosphere?