Hello Aditya,
See, no one exactly can tell you this as everyone would have different opinon about it. Insitutes like T.I.M.E, Career Launcher, Pearson, Careeranna and few others. But I would suggest look into first 3 names I mentioned and also you know T.I.M.E is one of the most prominent institute in India when it comes to providing education and support for exams like this. 

I hope this helps you.

All the best !!