2. Sample Papers
  3. 4th Class
  4. Social Science

4th Class Social Science Sample Paper Social Studies - Sample Test Paper-5

  • question_answer
    To make the sorting and delivery of letters smooth and efficient we use:

    A) PIN codes        

    B) STD codes

    C) ISD codes       

    D) UNIQUE codes

    E) None of these

    Correct Answer: A

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