Which one of the following reactions does not correspond to the preparation of "synthetic gasoline" during the Fischer-Tropsch process?

Question

(1)$ n\:CO+2\: n\: H_2 \: \longrightarrow \: n\: CH_3\:OH$

(2) $ n\: CO+ (2n+1)\: H_2 \longrightarrow\: C_nH_{2n+2}\: +n\: H_2O$

(3) $ n\: Co+ 2nH_2 \: \longrightarrow \: C_nH_{2n}+n\: H_2O$

(4) $ CO+ 3H_2\: \longrightarrow \: CH_4+H_2O$