Section 139 of Evidence Act "Cross-examination of person called to produce a document"
A person summoned to produce a document does not become a witness by the mere fact that he produces it and cannot be cross examined unless and until he is called as a witness.
Section 140 of Evidence Act "Witnesses to character"
Witnesses to character may be cross-examined and re-examined.
Section 141 of Evidence Act "Leading questions"
Any question suggesting the answer which the person putting
it wishes or expects to receive is called a leading
question.