YA MAMA :
can you suggest dual channel rams that i can buy for my pc
MOBO: asrock h61 vg4
CPU: intel core i5 2400
You are not giving us much information so we can offer best advice. Would be helpful if you let us know your budget, what country you are in and how much RAM you want.
Your motherboards has 2 dimm slots and supports upto 16GB RAM (assuming you have 64 bit operating system) of DDR3 RAM at 1600MHz.
In the UK you can get 2 x 8GB of Corsair Vengeance 1600MHz CAS 9 for £51.82.I choose this one based on cost but the choice for you may be different if you are in a different country or you want less (4GB or 8GB)