  Motivated by the large branching ratios observed for the process
$B\to\eta^{\prime}K$, we examine critically all the ingredients that go into
estimates of B decays into two light pseudoscalars. Within factorization
approximation, we examine several assumptions on the input parameters that
could have a strong bearing on the predictions. Among these are (i) the QCD
scale $\mu$ (ii) value of the form factors (iii) value of the light quark
masses, and in particular $m_s$ (iv) the value $\xi=1/N_c$, (v) charm content
of $\eta^{\prime}$. It is possible to account for all the data without invoking
new physics, though future experiments will provide tighter constraints on the
parameter space. We fin that CP violating asymmetries are in the observable
range for some modes.
