Which among the following statements are true for unisexual flowers?
(i) They possess both stamen and pistil.
(ii) They possess either stamen or pistil.
(iii) They exhibit cross pollination.
(iv) Unisexual flowers possessing only stamens cannot produce fruits.

Options

A. (i) and (iv)
B. (ii), (iii) and (iv)
C. (ii) and (iii)
D. (i), (iii) and (iv)