Please help with this pink flower

This is a photo from my friend. He would like to know the name of this flower.
Anybody could help me ID the flower?

Thank you very much.

 

It looks like a type of Phlox to me .. hopefully someone else chimes in and confirms/gives correct name ..

Marion

 

i agree with phlox

 

Kadai, I am not convinced that it is phlox. Would you be kind enough to take a close up of a single flower. Thank you.

 

Lychnis alpina?

http://www.pflanzen-im-web.de/files/Stauden/pflanzen-im-web-de-Alpenpechnelke-Lychnis-alpina.jpg

 

The structure of the flowers looked like Silene. I think I have found one with leaves as your pic. Silene armeria Electra.

http://images.google.com/imgres?img...n-gb:IE-SearchBox&rlz=1I7SUNA_en-GB&sa=N&um=1

http://www.organic-seeds.ca/cart/html/images/Electra_Pink.jpg

 

I think of Silene armeria too.

 

Thank you very much everybody.
My friend took the picture from India.
I hope this beautiful annual can be grown in Thailand.

Thank you again for helping me ID this flower :)