Read the following statements.
Statement I: Oxygen is evolved as by product in all photosynthetic organisms.
Statement II: Photosynthesis occurs in all unicellular and multicellular photoautotrophs.
In the light of given statements, choose the correct answer from the options given below.

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Both statements are incorrect

Statement - I is incorrect and statement - II is correct

Both statements are correct

Statement - I is correct and statement - II is incorrect

answer is A.

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Detailed Solution

Statement - I is incorrect and statement - II is correct

Statement - I: While oxygen is indeed evolved as a byproduct in most photosynthetic organisms, there are some exceptions. Photosynthetic organisms known as anoxygenic photosynthetic bacteria do not produce oxygen during photosynthesis because they do not use water as an electron donor.

Statement - II: Photosynthesis occurs in all unicellular and multicellular photoautotrophs.

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