已知
(1):H2(g)+ O2(g)=H2O(g) △H1="a" KJ/mol
(2)2H2(g)+ O2(g)=2H2O(g) △H2="b" KJ/mol
(3)H2(g)+ O2(g)=H2O(l) △H3="c" KJ/mol
(4)2H2(g)+ O2(g)=2H2O(l) △H4="d" KJ/mol
下列关系式正确的是( )
A.a<c<0 | B.b>d>0 | C.2a="b<0" | D.2c=d>0 |