If you are going for 45K, give a thought about Macbook Air 13 inches. Is is fast with flash drives, i5 processor and great screen quality.
Apart from these, it has 9-12 hour back up.
IF you are using some student discount(back to school offer) on Amazon you can get it at 55K
If you are...
Recently bought a macbook air on amazon for 55k with student discount(back to school offer)
If you are looking for more, probably you can also get Mac air with 128gb, 8gb ram, i5 or i7 at 63-64K. however, nothing can be changed on Air later.
samsung core2 duo is what i bought recently at that price. It works okay. I think it is even cheaper now if you buy from snapdeal or amazon with special offers
Better than this would be Moto X but there is no front cam :(
Very detailed review :) It is an amazing piece with improved battery back up as mentioned but lets see how long it is going to stay with the same numbers. Most of the Samsung phones I have used, degraded soon with battery back up.