Which is an example of a blueprint for writing a short story about traveling by train?

Its "a sketch of the train station"

Introduction: Here, you want to provide the initial details to set the story.
                     Ex: It was a Saturday morning. My bags were packed, and I was      on a train heading to Memphis. (You will likely want to include more details than where a character is/is going, but this "sets the stage" for the rest of the story.)
 
Rising action: Provide details of events that lead up to the climax.
                       Ex: We were traveling along for three hours. I introduced myself to the people sitting next to me. I started to hear a rumbling sound from underneath the train.

Climax: This is the central conflict of the story - state the main point, or main event of the story here.
              Ex: Suddenly, the car I was riding in veered off of the tracks, and was being rapidly dragged along the rubble.

Falling Action: This is where the main conflict of the story begins to be resolved.
                        Ex: The train quickly came to a halt, and a team came running out to try to get the train car back on the tracks. 

Resolution: This is how the events of the story. The main idea of the story has been clearly and fully presented and/or the central conflict has (usually) been resolved. This is also the end of your story. 
                        Ex: The people were able to get the car back onto the tracks. We travelled for a few more hours, and made it safely to Memphis. 

The dramatic irony is used by Ibsen in the following manner:

A. Mrs. Linde knows that she has always loved Krogstad, and so does the audience, but Krogstad does not know this at the beginning of the scene.

Explanation:

Krogstad and Mrs. Linde are characters in the play "A Doll's House", by Henrik Ibsen. As we can see in this excerpt, Mrs. Linde and Krogstad were in love once. She, however, broke up with him in order to marry a rich man. She did not do it because she did not love Krogstad. It was only because she had to think of her family and their well being. Still, when she wrote him the letter that would end their relationship, she made it seem as if she had no feelings left for him. Krogstad was deeply hurt and, as is made clear in their dialog, is still resentful over that. What he does not know is that she only made it seem that her feelings were gone because she thought it would be better that way. She has always loved him, and the audience knows that - it is Krogstad himself who does not know it. That constitutes dramatic irony - the audience knows something that the character does not.