I want to buy a camera under 35K so which is the best to buy under that price range. I have selected Sony 3000K, Nikon D3200, D5100, Canon 600D.

You do realize that K stand for thousands? Which of those cameras costs $30,000?
Also, any camera you buy is going to vary in price according to what lenses come with it, unless you are just buying the body.
I like Canon, and the 600D is in the Rebel series, a good model. Prices are in the mid to high hundreds, depending on lenses.

It is quite possible from the name that the OP is from India. Or some other country with a different dollar system.

Currency Converter | Currencies Center - Yahoo! India Finance

When purchasing a camera you cannot simply look at price. Ask yourself what features you want out of a camera. Is this an all purpose camera... or are there specified areas of photography that you want to be involved in? One camera may be cheaper than the other, but may also lack a handy feature or spec. that you'd want.

For $35,000, you can get the best DSLR with any lens you want - and still have tons of money leftover. Canon or Nikon are the two leading brands.

Milo

For $35,000 you could probibly buy something discarded from a spy agency... that could photograph license plates from a couple miles away.

Do they even make one commercially available for that price that's NOT encrusted in diamonds, gold or jewels?