  We calculate the leading order in $\alpha_s$ QCD amplitude for exclusive
neutrino and antineutrino production of a $D$ pseudoscalar charmed meson on an
unpolarized nucleon. We work in the framework of the collinear QCD approach
where generalized parton distributions (GPDs) factorize from perturbatively
calculable coefficient functions. We include both $O(m_c)$ terms in the
coefficient functions and $O(M_D)$ mass term contributions in the heavy meson
distribution amplitudes. We emphasize the sensitivity of specific observables
on the transversity quark GPDs.
