13. Who of the following was not a revolutionary? (A) Madanlal Dhingra
(B) Lala Hardayal
(C) Lala Lajpatrai
(D) Champak Raman Pillai
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(C) Lala Lajpatrai

Explanation:

Lala Lajpatrai was a member of the Indian National Congress where he was an important member of the independence movement in India. An Indian by profession, he preached peaceful methods to gain independence from the British government.

Lala Lajpatrai died a martyr of the movement after he was severely injured during a protest against a commission instituted by the British Raj.

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.