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Q: The oldest upanishad is ____.
  • A. Isha Upanishad
  • B. Mandukya Upanishad
  • C. Ken Upanishad
  • D. Chandogya Upanishad
Correct Answer: Option D - See the explanation of above question.
D. See the explanation of above question.

Explanations:

See the explanation of above question.