It's "piju", not "piji"
Nope. It is both, but piju used to be colloquial and piji used to be the only standard form.
Both are correct. Piju is more of a spoken form, piji more of a written one.
You have two similar answer ,one and two
Sorry,two and three
I have no idea what is two or three for you. What kind of exercise did you do. what is wrong on the fact that they are "similar"?
Identical piji dobre vino
I repeat: What kind of exercise did you do? Why is it wrong that they are "similar"?
Two answers in the exercise is identical