Reduction is defined as chemical reaction in which addition of electrons takes place. During reduction reaction oxidation state of the an element decreases.
The standard reduction value on an element is determined with respect to the reduction potential of hydrogen.The standard reduction potential of hydrogen is 0.0 Volts
With negative standard reduction potential means that they have higher tendency to loose electrons.By loosing of electrons elements gets oxidize.
With positive standard reduction potential means that they have higher tendency to gain electrons.By gaining of electrons elements gets reduce.
Hence, from the given options the correct answer is option A.
