KBC 2023| What substance does PSU, CIL deal with? KBC 2023, Check the answer to the question- What substance does PSU, CIL deal with? By Himani Budakoti - August 31, 2023 KBC 2023, Amitabh Bachchan. (Representative Image) KBC 2023, The options of the question – What substance does PSU, CIL deal with? A. Coal B. Cement C. Copper D. Clay The answer is A. Coal.