Please help me

HAI FRIENDS,

I WISH YOU ALL HAPPY NEW YEAR AND HAPPY PONGAL. I REALLY CONFUSED IN MY FUTURE DECISION. BECAUSE I AM A BSC MATHS GRADUATE. I HAVE APPLIED INTEGRATED PHD MATHS IN "INSTITUTE OF MATHEMATICAL SCIENCE" TARAMANI CHENNAI.  IN THE MEANTIME I HAVE APPEARED CPT EXAM. SUPPOSE WHEN I PASSED BOTH THE EXAM (CPT AND PHD ENTRANCE EXAM) MEANS WHAT CAN I DO. WHICH COURSE CAN I TAKE EITHER CA OR PHD IN MATHS. I KNOW THAT THIS TWO COURSE ARE BEST. SO, PLEASE SUGGEST WHICH COURSE IS BEST IN MY FUTURE.