Answer-Questions to corroborate evidence of a relevant fact:

Evidence Act Section 156. Questions tending to corroborate evidence of relevant fact, admissible. When a witness whom it is intended to corroborate gives evidence of any relevant fact, he may be questioned as to another circumstances which he observed at or near to the time or place at which such relevant fact occurred, if the Court is of opinion that such circumstances, if proved, would corroborate the testimony of the witness as to the relevant fact which he testifies.