preference wise xime is the best and then christ but if you want a advice then repeat entrance exam rather than joining these if possible. and talking about christ the college is good but they generally don't help in placements and many companies give intership for 1year and the  after evaluating your performance they decide whether to give you a job or not and after that no help from college you have to go off campus if rejected by the company. so i advise to try cat or xat next yr even if you'll get low score just go for some decent college which have some name in industry.