Which of the following reactions is not exothermic

Options

A. `C(s) + O_(2)(g) rarr CO_(2)(g)`
B. `C(s) + 2S(s) rarr CS_(2) (g)`
C. `CH_(4)(g) + 2O_(2)(g) rarr CO_(2)(g) + 2H_(2)O (l)`
D. `CO(g) + (1)/(2) O_(2) (g) rarr CO_(2)(g)`

Answer

B

Explanation

This reaction absorbed heat, so it is endothermic reaction.