4.
I think it is letter A
Which of the following is an example of dialogue?


A. [Lane is arranging afternoon tea on the table, and after the music has ceased, Algernon enters.]


B. Act I. Morning-room in Algernon's flat in Half-Moon Street.


C. Algernon. Did you hear what I was playing, Lane?


D. The room is luxuriously and artistically furnished. The sound of a piano is heard in the adjoining room.