average buyers, the differences in Android smartphones at this range are not going to be noticed. The slight bump an HTC One gives you in low-light performance compared with the slightly better screen of the LG G2 compared with the waterproof body of the Sony Xperia Z2óthese are things that you can decide based on what you care about. Again, go to a store, try out the handset, see which design and features appeal to you, and buy what you like; there's no real reason to listen to us supposed experts here, you'll be happy with whatever you buy.
The only two significantly different phones in this range that deserve a mention are:
Sony Xperia Z1 Compact
Available for: Around Rs. 35,000
If you want a phone that easily fits in your hand, doesn't have a gargantuan screen, but still performs as well as any of the top-end devices, the Xperia Z1 Compact is the way to go.
Samsung Galaxy Note 3
Available for: Around Rs. 43,000
The built-in stylus and Samsung's customized software for it makes the Note 3 stand out as the only tablet which really makes maximum use of its oversized screen. If a big-screen device is what you want, then buy the Note 3 over any other.