Find out the correct sentence:
$(i)$ Hybridisation means crossing between genetically dissimilar plants.
$(ii)$ Cross between two varieties is called as interspecific hybridisation.
$(iii)$ Introducing genes of desired character into a plant gives genetically modified crop.
$(iv)$ Cross between plants of two species is called as inter-varietal hybridisation.

  • A
    $(i)$ and $(iii)$
  • B
    $(ii)$ and $(iv)$
  • C
    $(ii)$ and $(iii)$
  • D
    $(iii)$ and $(iv)$

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$(c)$ Explain why excessive use of such chemicals should be avoided.

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