Different between central government and state government

Central government is present in the entire county and functions in whole country. WHEREAS State government is present in states and is not sub ordinate to the central government.

Explanation:

The state is the organization while the government is the particular group of people, the administrative bureaucracy that controls the state apparatus at a given time. ... States are immaterial and nonphysical social objects, whereas governments are groups of people with certain coercive powers

answer; (d) none of the above;

i believe the answer is:   psychological  experiment

in this experiment, wilhelm wundt became the first person that implement scientific method in analyzing the pyschological phenomenon.

due to this result, wilhelm wundt also able to make psychology to be acknowledged as a separate scientific field from biology.