Chronologically arrange the events related to the history of United Nations: (A) UN Charter approved in San Francisco by 50 states (B) First UN Peacekeeping force sent to Suez Canal (C) Trygve Lie appointed Secretary General (D) UNDP was established Choose the correct answer from the options given below:
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Link each event to significant historical milestones (e.g., post-World War II for the UN Charter).