Which is best 16GB ram for my laptop?

@thisisrajr95196 you probably already know that your computer uses 16GB max7 / PC3-12800 1600MHz DDR3*, non-parity, dual-channel capable, two 204-pin SO-DIMM sockets. Whatever memory you get, make sure that you have a "matching pair" with the same specs. I prefer Crucial but it is a personal preference. Something like this would work for me. It is not an endorsement of the vendor just an example. You should buy whatever appeals to you and what you want to spend on it.

Make sure that this hanging is related to your memory (it probably is) but you want to make sure that your system has no other issues.