Which of the sentences below is an excerpt taken from "In Another Country" by Ernest Hemingway is an example of irony?

A. My knee did not bend and the leg dropped straight from the knee to the ankle without a calf, and the machine was to bend the knee and make it move as riding a tricycle. B. But it did not bend yet, and instead the machine lurched when it came to the bending part.
C. The doctor said: "That will all pass.
D.You are a fortunate young man.
E. You will play football again like a champion."

And you think it's ... ?

A because the machine bent instead of the knee?

Where in A does it say that "the machine bent" instead of the knee?

Oh you are right the machine bent in choice B, so it is B?

It is confusing to me because I thought the irony should be in the choice. Like it would make more sense if the choice was the knee did not bend but the machine bent.

I think you're right.

Thank-you.

You're welcome.