Which entrance exam should I take to pursue MBA?

You can choose among CAT, XAT, CMAT, MHCET, SNAP and IIFT. The difference is as per your choice of college. For Symbiosis college-SNAP, IIFT(Delhi/Kolkata)- IIFT. For Maharashtra colleges - MHCET. But most of the colleges in India do accept CAT scores. You can check on this link for the colleges acc

There are many exam and it depend on the institutions like, if you want to go for IIM, then you should give CAT exam and to get admission in Jamnalal Bajaj – Mumbai, you will have to give CET. I hope it helps.