What are you trying to ask?
The correct answer is aquella, because we would use the word if there was a difference in the distance. Like if you were in the right corner of a room, and the guitar was at the left corner of the room. And another reason is because aquella is feminine and in spanish, guitar is feminine.
Mi casa .
duh . these questions are amazing .
Carlos (anda , va , camina) al parque.