Which of the following is the correct order of the Secretary Generals of U.N.O.? I. U Thant, II. Kurt Waldheim, III. Javier Perez de Cuellor, IV. Dag Hammarskjoeld.
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Which of the following is the correct order of the Secretary Generals of U.N.O.? I. U Thant, II. Kurt Waldheim, III. Javier Perez de Cuellor, IV. Dag Hammarskjoeld.