HELP ASAP! 20 POINTS!

The following excerpts are from different poems by Emily Dickinson. Which one of the excerpts uses irony?


1. My cocoon tightens, colors tease,
I'm feeling for the air;
A dim capacity for wings
Degrades the dress I wear.


2. Could she have guessed that it would be;
Could but a crier of the glee
Have climbed the distant hill;
Had not the bliss so slow a pace, —
Who knows but this surrendered face
Were undefeated still?


3. One dignity delays for all,
One mitred afternoon.
None can avoid this purple,
None evade this crown.


4. There's a certain slant of light,
On winter afternoons,
That oppresses, like the weight
Of cathedral tunes.

Heavenly hurt it gives us;
We can find no scar,
But internal difference
Where the meanings are.


5. Exultation is the going
Of an inland soul to sea, —
Past the houses, past the headlands,
Into deep eternity!