Correct option is C
Poland was an original member of the United Nations but was not represented at the
San Francisco Conference in 1945, and therefore did not sign the United Nations Charter on
26 June 1945. Poland later signed the Charter on
15 October 1945.
Information Booster:
Poland's absence from the San Francisco Conference was due to political changes occurring in the country after World War II. Despite this, it is recognized as one of the founding members of the UN.
Additional Knowledge:
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Belarus and Ukraine (b, d): These countries were also founding members of the UN, signing the Charter at the San Francisco Conference.