What is the definition of isotonic solution with respect to plant cells?

What is the definition of isotonic solution with respect to plant cells?
  1. The external solution is more concentrated than the cytoplasm
  2. The external solution is more dilute than the cytoplasm
  3. The external solution balances the osmotic pressure of the cytoplasm
  4. The external solution has the same solute concentration as the cytoplasm

Solution

If the external solution balances the osmotic pressure of the cytoplasm, it is considered to be isotonic.

Asked in: NCERT

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