Which RAM will work on my laptop and which is the best for me to consider?

[buster88]

I am looking forward to upgrade my RAM. I have few questions!
Q1. Should I get 2 4 GB RAMs or 1 8 GB RAM. Which option will be better and why?

Q2. Which RAM will be compatible to my laptop out of the given RAMs in the site,
4 GB http://www.flipkart.com/computers/computer-components/rams/pr?p%5B%5D=facets.capacity%255B%255D%3D4%2BGB&p%5B%5D=facets.data_rate%255B%255D%3DDDR3&p%5B%5D=facets.device%255B%255D%3DLaptop&p%5B%5D=sort%3Dpopularity&sid=6bo%2Cg0i%2Cs5u&ref=72530e6b-0c37-4afc-bf2b-585132bccfbc

8 GB http://www.flipkart.com/computers/computer-components/rams/pr?p%5B%5D=facets.capacity%255B%255D%3D8%2BGB&p%5B%5D=facets.data_rate%255B%255D%3DDDR3&p%5B%5D=sort%3Dpopularity&sid=6bo%2Cg0i%2Cs5u&ref=7d4b7e69-f049-40df-a8e7-569e4bdcbc0d


And here are the pictures of my current RAM and its specifications:

http://imagizer.imageshack.us/v2/150x100q90/661/0NDYEZ.jpg

And this what is written on the empty RAM slot on my laptop:

 

[RadiKing222]

It looks like it...

 

[Shantanu Ghose]

It looks like it...

Thanks Man 😀

 

[RadiKing222]

Yea a lot of help...