law: Indian Evidence Act, 1872 
  39. What evidence to be given when statement forms part of a
  
  conversation, document, electronic record, book or series of letters or papers.
  
  
  When any statement of
  
  which evidence is given forms part of a longer statement, or of a conversation
  
  or part of an isolated document, or is contained in a document which forms part
  
  of a book, or is contained in part of electronic record or of a connected
  
  series of letters or papers, evidence shall be given of so much and no more of
  
  the statement, conversation, document, electronic record, book or series of
  
  letters or papers as the Court considers necessary in that particular case to
  
  the full understanding of the nature and effect of the statement, and of the
  
  circumstances under which it was made.]