The heat change for the following reaction, $\mathrm{C}\left(\mathrm{graphite}\right)+\frac{1}{4}{\mathrm{S}}_8\left(\mathrm{\alpha }\right)\to {\mathrm{CS}}_2\left(\mathrm{l}\right)$is known as

• A

  Heat of formation of CS₂

• B

  Heat of fusion of CS₂

• C

  Heat of vapourisation of CS₂

• D

  Heat of transition of Carbon