The correct option is C CaCN2
The product obtained as a result of a reaction of nitrogen with calcium carbide (CaC2) is calcium cyanamide.
The reaction takes place at temperature around 1000oC.
CaC2+N21000oC−−−−→CaCN2+C
The mixture of CaNCN+C is called nitrolim – a fertilizer that hydrolyzes to yield ammonia.
Hence, option (c) is correct.