A. Thiokol
B. Phenol formaldehyde
C. Urea formaldehyde
D. Polystyrene
Correct Answer: Thiokol ✔
Last Updated: March 08, 2019
A. Thiokol
B. Phenol formaldehyde
C. Urea formaldehyde
D. Polystyrene
Correct Answer: Thiokol ✔
Last Updated: March 08, 2019