Who amongst the following did not serve as secretary general of the League of nations?

Josip Broz Tito did not serve as the Secretary General of the League of Nations. The League of Nations was an international organization established after World War I to promote cooperation and prevent conflicts between nations. Its Secretary General was responsible for overseeing the organization's activities and promoting its goals. Sean Lester, Joseph Avenol, and Eric Drummond all served as Secretary General of the League of Nations at different times. However, Josip Broz Tito, who was the leader of Yugoslavia from 1943 to 1980, did not hold this position. It is important to note that the League of Nations was dissolved in 1946 and replaced by the United Nations (UN), which is the current international organization responsible for promoting peace, security, and cooperation among nations.