Que. | वायुमण्ड में नाड्रोजन की प्रतिशतता है - |
- A. 21 प्रतिशत
- B. 70 प्रतिशत
- C. 71 प्रतिशत
- D. 78 प्रतिशत
Right Answer is :
✓ D. 78 प्रतिशत
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