I'm finding it hard to select a camera out of this?

Nikon D90
Nikon D5200
Canon 600D
Sony A57k
Sony A65VK
I'm entering the dslr world. I'm confused! My Budget is 60000INR and expect a 18-135mm lens.

You are all over the map.

The Nikon D5200 has the latest dSLR sensor technology and thus has the highest performing sensor.
The Canon 600D was replaced by the 650D
The Sony Alpha cameras, while do a better job when shooting video, have an electronic viewfinder which is NOT recommended if you shoot any action, sports or wildlife on the move

Not all of the cameras listed have a 18-135 mm lens available.

If you want an 18-135mm lens, get the Canon 650D with the new 18-135mm STM lens. The lens is sharper than the older 18-135mm model, but it has some chromatic aberration. Unlike earlier Canons, the 650D has processor correction for chromatic aberration.

With that budget, get the Sony A57 plus 18-135 SAM lens (same as I use).
Sony A58 is on the market in a few weeks and has better sensor and viewfinder, but worse LCD (smaller and only tilts).So get tha A57 while you can if a more flexible LCD for video is very important.
Sony A77 would be better as it is more robust, weather sealed and allows individual front/back focus adjustment of individual lenses.