What are the common characteristics of Gymnosperms?

Which of the following orders of Gymnosperms is completely extinct?

Given below are two statements: One labelled as Assertion $A$ and the other labelled as Reason $R$:
Assertion $A$: In gymnosperms,the pollen grains are released from the microsporangium and carried by air currents.
Reason $R$: Air currents carry the pollen grains to the mouth of the archegonia where the male gametes are discharged and pollen tube is not formed.
In the light of the above statements,choose the correct answer from the options given below:

Statement $S$: $Thuja$ is a pre-fertilization plant.
Statement $R$: In $Thuja$,the endosperm is formed after fertilization.

In gymnosperms,during pollination,pollen grains are released from the microsporangium and transferred to:

The resin duct of gymnosperms is an example of .........