If none, then it could be said that China or India are more likely than any other particular country.
Is the birth rate of China and India combined more than that of the rest of the world? If so, then it's more likely that it will occur there than anywhere else.
So your point that those two have the highest birth rate isn't responsive to tghw's point that those two alone don't represent the majority of new births. So if we had to bet on "one country", a person would pick one of those two. But when we're betting "India/China or somewhere else?" the smart money is on "somewhere else".
I'm asking two questions. The second, quoted here, is saying the same thing as the OP.
No, partially due to the one-child policy.