Samsung 840.
Crucial M4, Samsung 830, Intel 330, 335, and 520 were all good last generation.
There isn't going to be a noticeable performance difference between any of these, so get whatever's cheapest.
Looking at Flipkart, I see that the Samsung 840 is actually the cheapest 120GB at Rs. 6208, so you're good there. If you wanted larger, I'd suggest getting two of them and putting them in RAID 0, considering that the cheapest 240GB drive is almost exactly twice the price.