Dramatic irony means that

Aeverything works out in the end.
Bthe audience knows something the character or characters don't.
Cthings are going to end very badly for someone.
Dthe cosmos, state, family, and individual follow the same pattern

Verified Answer :

Dramatic irony means that 

B. the audience knows something that the character or characters don't.

An example of dramatic irony is when the viewer of a movie knows that a murderer is upstairs in the baby's room, but the family doesn't, so they go upstairs to check on the baby.  Dramatic irony can often be frustrating for readers or viewers.