(4)A witness may be questioned in cross-examination not only on the subject of enquiry but upon any other subject, however remote, for the purpose of testing the credibility, his memory, his means of knowledge, or his accuracy. The moment it appears that a question is being asked which does not bear upon the issue or give promise of helping the Court or to estimate the value of the witness's testimony, it is the duty of the Court to interfere as well as to protect the witness from what then become an injustice or insult so as to prevent the time of the Court from being wasted. The Court should also prevent any evidence being given to contradict a witness in contravention of Section 153 of the Evidence Act.
