Step 1: Understand corroborative evidence
- Corroborative evidence is evidence that strengthens or confirms the main evidence presented in a case.
- It helps to verify the truth of a fact or testimony by providing independent support.
Step 2: Importance in trials
- It increases the reliability and credibility of the main evidence.
- It reduces doubts about the accuracy of the primary evidence.
Step 3: Why other options are incorrect
- (B) Undermining credibility is opposite to corroboration.
- (C) Cross-examination is a method, not the evidence itself.
- (D) Inadmissible evidence cannot be corroborative.
Thus, option (A) is correct.