Answer : 4. "Revolution of China (1912)"
Explanation :

China revolution of 1912- In 1912, the Qing (or Manchu) dynasty was overthrown by a nationalist democratic revolt that created a republic. It was losing its last capable leader. The emperor Puyi was a child in 1911, and the regency was incompetent to guide the country. When an agreement was signed (April 5, 1911) with a four-power group of foreign bankers for the construction of lines on the Hukwang (Huguang) Railway in central China, the chain of events that immediately led to the revolution began.