In which of the following reactions does water act as an oxidising agent?
A
$$3F_2 +3H_2O \longrightarrow 6HF+O_3$$
B
$$AIN +3H_2O\longrightarrow Al(OH)_3+NH_3$$
C
$$C+H_2O \longrightarrow CO+H_2$$
D
$$CaC_2 +2H_2O \longrightarrow Ca(OH)_2+C_2 H_2$$
Correct option is C. $$C+H_2O \longrightarrow CO+H_2$$