The phenomenon of 'Test Tube Baby' is correctly explained in which of the following explanations?

Options :
  1. When every process of embryo formation is in the test tube.
  2. When the embryo develops in a test tube.
  3. When the fertilisation is external and development is internal.
  4. When the fertilisation is internal and development is external.

Answer and Explanation :-

Answer: Option 3


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