Which of the following is correct w.r.t. the direction of interconversion of plastids?

Proplastid → Etioplast → Chloroplast

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Etioplast → Proplastid → Chloroplast

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Etioplast → Chloroplast → Proplastid

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Proplastid → Chloroplast → Etioplast

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Solution

The correct option is A Proplastid → Etioplast → Chloroplast
A proplastid which does not get enough of light or which is deprived of light will be known as an Etioplast. When etioplast receives a good amount of sunlight, it turns into chloroplast. Chloroplast can also change into chromoplast. Possible plastid interconversions is given below in the diagram:

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