How many of the following lone-pair indicated is not involved in resonance:

a) b) c) d) e) $C{H}_2=CH-C{H}_2^{-}$  f) $C{H}_2=CH-CH=\stackrel{••}{NH}$

Structures, b, d, e involved in resonance.

In a the lone pair electron on nitrogen is perpendicular to plane of the ring $\mathrm{\pi }$-bonds does not involve in resonance.

In c no conjugation 

In f lone pair electrons are present on more electronegative sp² nitrogen atom