How many of the following cannot show tautomerism? 

Acetophenone, acetaldehyde, cyclohexanone, acetylacetone, benzoquinone, acetone, benzaldehyde, butanone, ethyl acetoacetate. 

Amongst the following the total number of electrophiles is :

${\mathrm{CN}}^{-}, {\mathrm{H}}^{+}, {{\mathrm{NO}}_2}^{+}, {\mathrm{Cl}}^{+},{\mathrm{OH}}^{-}, {\mathrm{H}}_3{\mathrm{O}}^{+}, :{\mathrm{CH}}_2, :{\mathrm{NH}}_3, {\mathrm{Na}}^{+}$

Amongst the following the total number of nucleophiles is :

${\mathrm{SO}}_3, {{\mathrm{NH}}_2}^{-}, {\mathrm{R}}^{-}, {\mathrm{H}}_2\mathrm{O}, {\mathrm{OR}}^{-}, \mathrm{ROH}, {\mathrm{AlCl}}_3, {\mathrm{H}}^{-}, {\mathrm{BF}}_3$