which of the following decision was not one of those taken at the first Christian Council in Jerusalem?

The decision that Gentile Christians should all be circumcised was not one of those taken at the first Christian Council in Jerusalem. At the council, the apostles and elders came together to discuss the issue of whether Gentile converts to Christianity needed to follow Jewish law and be circumcised. After much debate, they reached a decision that Gentile Christians should abstain from the pollution of idols, avoid unchastity, not eat meat that has been strangled, and avoid blood. However, they did not require circumcision for Gentile Christians, as they believed that salvation came through faith in Jesus Christ and not through adherence to Jewish law.