The cause of mutation is

Options :
  1. Changes of DNA
  2. Changes in chromosomes
  3. changes in genes
  4. all the above
Answer and Explanation :-

Answer: Option 4

Explanation:

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Aeschylus writes, "In our sleep, pain that cannot forget falls drop by drop upon the heart and in our own despair, against our will, comes wisdom through the awful grade of God.
-Madeleine L'Engle Walking on Water: Reflections on Faith and Art