In a case where a gun obtained through an unlawful search is used in trial, what is the correct principle about its admissibility and the conviction?

• A. The gun is not indispensable; conviction can rely on other evidence.
• B. The gun must be admitted; otherwise conviction can't stand.
• C. The gun is always admissible regardless of legality.
• D. The gun's inadmissibility requires automatic quash.

Answer: (A)