I have studied B.Com I have one arrear in 3rd semester. And I have written arrear exam. I'm waiting for result. Can I get admission for MBA.

The college which you want to choose would let you know whether it takes admission in results awaited cases or not. However, these days admission are happening through CAT results. So, if you want to do MBA from a reputed institution then clear your CAT exams to get admission. All the best.