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Q: What should be the activity ratio for inactive clays? निष्क्रिय मिट्टी के लिए सक्रियता अनुपात क्या होना चाहिए?
  • A. < 1.50
  • B. 0.30 - 0.85
  • C. 0.90 - 1.25
  • D. < 0.75
Correct Answer: Option D -
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Explanations:

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