Question

4
The official name of mainland China is
(a) Republic of China
(b) Democratic Republic of China
(c) People's Republic of China
(d) Democratic People's Republic of China​

Answer 1

c) People's republic of china

is the official name of mainland China.

Answer 2

The Official Name of mainland China is → ${ \boxed{ \red{ \boxed{ \text{People's\: Republic \:of \:China}}}}}$