The correct option is
A True
This statement is true because of the following reasons:
(i) Postscript means 'written afterward'.
(ii) It is derived from the Latin phrase post Scriptum .' It means additions matter not written.
(iii) It is like a footnote added to the letter.
(iv) It is necessary if the same information is received late and its request to be conveyed along with the original letter.
(v) To have a postscript in the letter is not a good practice and hence should be avoided.
(vi) It indicates the possible carelessness of the writer.
(vii) A letter without a postscript is not incomplete.
(viii) It should be used only for communicating an urgent message.
(ix) However, postscript should not be used in business letters.