Do the pressure standing waves exist simultaneously with the displacement standing waves?$$ Why or why not?

Question $4$ options:

a$)$ no$,$ because they are parallels of each other.

b$)$ yes, but their nodes and antinodes are located in opposite locations.

c$)$ no$,$ because their nodes and antinodes are located in opposite locations.

d$)$ yes, and their nodes and antinodes coincide spatially at the same location.