Which of the following reactions is an example of use of water gas in the synthesis of other compounds?

1.  CH4(g)+H2O(g)Ni1270KCO(g)+H2(g)

2.  CO(g)+H2O(g)Catalyst673KCO2(g)+H2(g)

3.  CnH2n+2+nH2O(g)Ni1270KnCO+(2n+1)H2

4.  CO(g)+2H2(g)CatalystCobaltCH3OH(l)