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1.  নিম্নোক্ত অরবিটালসমুহের মধ্যে কোনটি অসম্ভব?

  • A. 6s and 5f
  • B. 6s and 5f
  • C. 6s and 5f
  • D. 6s and 5f

Answer: Option B

Explanation:

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