Q. I. In Rhodophyceae, food is stored in the form of mannitol and laminarin.
II. The ovules of Gymnosperms are not enclosed by ovary wall.
III. Salvinia is heterosporous.
IV. In the diplontic life-cycle, the free living gametophyte represents the dominant phase.
Of the above statements

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Solution:

Correct answer is (a) II and III are correct but I and IV are wrong.