1.

*$_Blast furnace gas constitutes mainly of?

A. N‚ÇÇ & CH‚ÇÑ
B. N‚ÇÇ & H‚ÇÇ
C. N‚ÇÇ & CO
D. CH‚ÇÑ & CO‚ÇÇ
Answer» D. CH‚Äö√á√ë & CO‚Äö√á√á


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