I am taking up P1,P2,P3 and P4 this September. Considering the view that I have already taken up CA examinations in my country(not cleared),Is it possible to get through if I do an intense preparation? whether there were any history that People have cleared 4 P level examinations taken at a time?
Anything is possible, but they are very hard exams and it depends just how much time you are able to devote to studying (and how comparable they are in level of difficulty to the CA exams in your country).
I suggest that you look at one or two past papers for each of the exams (they are on the ACCA website) just to get an idea of the level of difficulty and therefore how much you are already happy with or would be new to you.