Which country was readmitted to the Olympics after her 21 year suspension?

Question

Answer 1

country is "SOUTH AFRICA"

South Africa did not compete at Olympic Games from 1964 to 1988, as a part of the sporting boycott of South Africa during the Apartheid era. The South African National Olympic Committee (NOC) was expelled from the International Olympic Committee (IOC) in 1970. In 1991, as part of the transition to multiracial equality, a new NOC was formed and admitted to the IOC, and the country competed at the 1992 Summer Olympics.

Comments

When was it omitted from Olympic and why it was omitted. When was it readmitted.