[CFD_npc]

Can someone help me with this multiple choice question?

Spatial discretization methods M1 (order1) and M2 (order 2) are applied on the same grid with uniform spacing h. Which is the correct statement?

1) the truncation error depends on the grid spacing h;

2) the truncation error of method M2 is always higher than M1 ;

3) the truncation error of method M1 is always higher than M2 ;

4) the truncation error does not depend on the grid spacing h, but on the order of the methods

thanks in advance