Forensic Medicine Black powder composition: A 15 % potassium nitrate + 10 % sulphur + 10% charcoal B 15 % potassium nitrate + 8 % sulphur + 10% charcoal C 75 % potassium nitrate + 8% sulphur + 15% charcoal D 75 % potassium nitrate + 10% sulphur + 15% charcoal 💡 Explanation Black powder composition: ✓ Correct Answer: D. 75 % potassium nitrate + 10% sulphur + 15% charcoal