The correct option is D Pinus - Dioecious
Pinus, like Cycas, is a gymnosperm, but unlike Cycas, it is monoecious, i.e., the same tree bears both male and female sex organs.
Cycas is a gymnosperm which is dioecious, i.e., male and female plants are separate.
Salvinia and Equisetum are pteridophytes. Salvinia is heterosporous, i.e., it produces two kinds of spores: macrospores and microspores. Equisetum, on the other hand, is homosporous.