Consider the following statements comparing Cyanobacteria (blue-green algae) and green plants: 1. Both cyanobacteria and green plants perform oxygenic photosynthesis using water as an electron donor. 2. Cyanobacteria fix nitrogen using specialized cells called heterocysts, a capability completely absent in green plants themselves without symbiotic association. 3. Both contain membrane-bound chloroplasts containing thylakoids stacked into grana. Which of the statements given above are correct?

Options:

• A: 2 and 3 only
• B: 1 and 2 only
• C: 1 and 3 only
• D: 1, 2 and 3

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