From the following, choose the set in which names of Secretary-Generals of the UNO are arranged in correct chronological order?

[A].	U Thant, Kurt Waldheim, Dag Hammarskjoeld, Trygve Lie.
[B].	Trygve Lie, Dag Hammarskjoeld, U Thant, Kurt Waldheim.
[C].	Trygve Lie, U Thant , Dag Hammarskjoeld, Kurt Waldheim.
[D].	U Thant, Dag Hammarskjoeld, Trygve Lie, Kurt Waldheim.

Answer: Option B

Explanation:

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