i am pursuing b com (pass) final year and i may get 50% in my graduation. i am confusing in selection of CAT,MAT, XAT,etc..?

First of all let me tell you that i absolutely do not feel whats there to get confused about CAT MAT XAT GMAT.you need to clear your mind what & where you want to do with your future Dear, as you have stated u r expecting to score around 50 %.but the results aren't out yet... so please wait for you