Yes, show 4 month bank statements and bank letter. Get it in motion now if you are applying for Fall semester. However, even if you show 1 or 2 crore RS available in your bank account there is no certainty that you will get student visa. For example, if you have done bachelors in other field and going for a diploma in another field , won't make sense to VO. Also, the course availibilty in your home country.
All of these things need to have a look at not just money factor this is what I meant by "don't get caught with showing lots and lots of money or money thing".
I hope it does help.