The correct option is D Vridhishankar Trivedi
Sirohi Praja Mandal was set up after the resolution passed in Haripura session to interfere in the Princely States. It was set up in 1934 by Vridhishankar Trivedi under the guidance of Gokul Bhai Bhatt. It was set up systematically by Gokul Bhai Bhatt in 1939. It was set up with the main objective of establishing a responsible government in the Princely States.