Which among the following UN secretaries- General made efforts to resolve the problems of Namibia and Lebanon?

Kurt Waldheim

The correct answer is Option 3 - Kurt Waldheim

Kurt Waldheim made efforts to resolve the problems of Namibia and Lebanon.

Kurt Waldheim (1972-1981) Austria; diplomat and foreign minister; made efforts to resolve the problems of Namibia and Lebanon; oversaw the relief operation in Bangladesh; China blocked his bid for a third term.