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Which of the following statements regarding gymnosperms are correct?

I. Ovules are naked - not enclosed by any ovary wall before fertilisation but seeds that develop after fertilisation are covered.

II. In all living Gymnosperms, sporophyte is dominant over the gametophyte.

III. They are hetrosporous.

IV. The male and female gametophytes do not have an independent existence.

(1) I, II and III

(2) I, III and IV

(3) II, III and IV

(4) I, II, III and IV