In which of the following reactions , chlorine acts as an oxidizing agent ?

Question

(i) $CH_3CH_2OH+ Cl_2 \longrightarrow CH_3CHO+HCl$

(ii) $CH_3CHO+ Cl_2 \longrightarrow CCl_3.CHO+HCl$

(iii) $CH_4+ Cl_2 \longrightarrow CH_3Cl+HCl$

The corret answer is

(1) (i) only

(2) (ii) only

(3) (i) and (iii)

(4) (i) , (ii) and (iii)