How much time is generally required by the pine plant from pollination to fertilization?

Which of the following is true for the plant shown in the given figure?

Pollen grains of $Cycas$ are shed at which stage?

Given below are two statements:
Statement $I$: In gymnosperms, the male and female gametophytes remain within the sporangia.
Statement $II$: In gymnosperms, seeds are not covered.
In the light of the above statements, choose the most appropriate answer from the options given below:

The wood obtained from the $Pinus$ plant is used for:

The sterile part of the $Cycas$ microsporophyll is known as: