A. Lignites
B. Bituminous coals
C. Semi-anthracites
D. Anthracites
Correct Answer: Bituminous coals ✔
Last Updated: March 08, 2019
A. Lignites
B. Bituminous coals
C. Semi-anthracites
D. Anthracites
Correct Answer: Bituminous coals ✔
Last Updated: March 08, 2019