Answers (2)
www.google.com/search?q=%22Pulse+of+Asia%22
That name identifies a book, a scientific society, and a meeting held every year, but no particular country.
This illustrates a method to pass multiple choice tests. You eliminate answers by common sense. Mongolia is one of the least populated areas in the world, not the pulse of anything in any way. India is not considered a part of Asia; it is considered a sub-continent. Turkey is considered the gateway of the middle east, not a part of Asia. That leaves only Thailand, even if you don't know any reason to call it that.