A. Sulphur
B. Charcoal
C. Potassium nitrate
D. All A , B, & C.
Correct Answer: D. All A , B, & C. ✔
Last Updated: February 14, 2019
A. Sulphur
B. Charcoal
C. Potassium nitrate
D. All A , B, & C.
Correct Answer: D. All A , B, & C. ✔
Last Updated: February 14, 2019