  We give a detailed derivation of a supersymmetric configuration of wrapped
D5-branes on a two-cycle of a warped resolved conifold. Our analysis reveals
that the resolved conifold should support a non-Kahler metric with an SU(3)
structure. We use this as a starting point of the geometric transition in type
IIB theory. A mirror, and a subsequent flop transition using an intermediate
M-theory configuration with a G_2 structure, gives rise to the complete IR
geometric transition in type IIA theory. A further mirror transformation gives
the type IIB gravity dual of the IR gauge theory on the wrapped D5-branes.
Expectedly non-Kahler deformations of the resolved and the deformed conifolds
appear as the gravity duals of the confining gauge theories in type IIA and
type IIB theories respectively, although in more generic cases these manifolds
could also be non-geometric. In the local limit we reproduce precisely the
scenarios presented in our earlier works. Our present work should therefore be
viewed as providing a supergravity proof of geometric transitions in the full
global scenarios in type II theories.
