Reduction potential is the tendency for a chemical species to gain electrons and be oxidized. gain electrons and be reduced. lose electrons and be oxidized. lose electrons and be reduced.

The correct answer is option (c)

Reduction potential is the tendency for a chemical species to gain electrons and be reduced. 

It is usually positive. The more the positive potential, more easily it will gain electrons and get reduced easily.

It has to be b i hope this

Neither model is able to show the reactivity of potassium.