Question

what is a microspore?
it is a spore produced by the male cone of a gymnosperm
it is the first leaves of the plant
it develops within the megasporangium in the female cone
sporophyte that produces two types of spores

Explanation:

Microspores are spores produced by the male cones (microsporangiate strobili) of gymnosperms. They develop into male gametophytes (pollen grains). The first leaves of a plant are cotyledons. Megasporangium in the female cone is related to megaspores (not microspores). A sporophyte that produces two types of spores is called heterosporous, but that's a description of the sporophyte's spore - producing nature, not what a microspore is.

Answer:

It is a spore produced by the male cone of a Gymnosperm.