  This paper concerns the null controllability for a class of stochastic
degenerate parabolic equations. We first establish a global Carleman estimate
for a linear forward stochastic degenerate equation with multiplicative noise.
Using this estimate we prove the null controllability of the backward equation
and obtain a partial result for the controllability of the forward equation.
Also, using a new Carleman estimate for backward equation with weighted
function which does not vanish at time t = 0 and the duality method HUM we get
the null controllability of a forward stochastic degenerate equation under the
action of two controls.
