There are this many autonomous regions in China today.

a. 2

c. 4

b. 3

d. 5

There are 5 autonomous regions in China today. One of them is Tibet, and the others are: Guangxi, Inner Mongolia, Ningxia, and Xinjiang. They have local governments and their own laws. They are usually centered around a minority ethnicity, for example, Xinjiang is home to the Uyghurs (and some other minorities).