During the first World War, San Francisco in North America was the center of revolutionaries of Ghadar movement. San Francisco is situated in the western part of United States of America, so the option (C) is taken as a correct option. But if one takes in terms of South and North America continents then the answer will be option (B). Generally, America is sub-divided into three parts namely North America, Central America, and the South America. ....Read more