Choose the correct answer:

(i) Yangtze River is known as Sorrow of China.

(ii) Wu-Ti constructed the Great Wall of China.

(iii) Chinese invented gun powder.

(iv) According to traditions Mencius was the founder of Taoism.

is the answer because (iii) is correct. The invention of gun powder is popularly listed as one of the "Four Great Inventions" of China.

a) is not the answer because (i) is incorrect. Yellow River is the second longest in China after the Yangtze River. Yellow river is called the sorrow of China.

b) is not the answer because (ii) is incorrect. It was the state Chu who first built the wall. It was during the Qin Dynasty .To defend the invasions

from northern invaders, Emperor Qin Shi Huang had all the walls (Great Wall of China) connected up.

d) is not the answer because (iv) is incorrect. Lao-Tzu (also known as Laozi or Lao-Tze) was a Chinese philosopher attributed with founding the philosophical system of Taoism.