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1. প্ৰমাণ বায়ুমণ্ডলীয় চাপ কত?

  • A. ৭৬ cm of Hg
  • B. ৭৬ cm of Hg
  • C. ৭৬ cm of Hg
  • D. ৭৬ cm of Hg

Answer: Option A

Explanation:

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