China.
China has largest number of graduates.
The age category with the highest number of high school graduates is typically around 17-18 years old, as this is the age when students typically complete their high school education and receive their diploma.
That would be China, with the highest population, and therefore the highest number of telephone users.
Africa
usa
It depends on the country.
The country who has the highest number of soldiers is the People's of Republic of China. They have 4,585,000 soldiers total and 2,285,000 soldiers who are active.
USA
china
india
us
Japan