  We discuss five dimensional (5D) supersymmetric SO(10) compactified on the
orbifold $S^1/(Z_2\times Z_2')$ such that the SO(10) gauge symmetry is broken
on the fixed point(s) to its maximal subgroup(s). The MSSM gauge symmetry is
recovered by the usual Higgs mechanism, and inflation is associated with the
Higgs mechanism, implemented through F-term scalar potentials on the two fixed
points. The spontaneous breaking scale is fixed from $\delta T/T$ measurements
to be around $10^{16}$ GeV, and the scalar spectral index $n=0.98-0.99$. The
inflaton field decays into right-handed neutrinos whose subsequent out of
equilibrium decay yield the observed baryon asymmetry via leptogenesis.
