  We study the leading contribution to the scalar and the pseudoscalar
two-point function in the large N expansion of QCD using the worldline
techniques. We find that in this limit there exists a relationship between
these two Green's functions which implies that for every massive pseudoscalar
meson there exists a scalar meson of identical mass. This is true even when
chiral symmetry is spontaneously broken. The relationship between the Green's
function further suggests that in the planar limit the sigma mass must be
identical to the eta mass. We also discuss the relevance of these results for
the quenched lattice QCD simulations and for hadron phenomenology.
