Explanation:

Jaipal Singh Munda was a politician, prolific writer and sportsman. He was the member of the Constituent Assembly which debated on the new Constitution of the Indian Union. He captained the Indian field hockey team to clinch gold in the 1928 Summer Olympics in Amsterdam.Singh became president of Adivasi Mahasabha in 1939. In 1940 at Ramgarh session of Congress, he discussed with Subash Chandra Bose for need to form separate state Jharkhand. Subash Chandra Bose replied that such request will have affect the freedom struggle. After the independence of India, the Adivasi Mahasabha re-emerged as Jharkhand Party and it accommodated non-tribal people to achieve long-term goals. He is popularly known as "Marang Gomke (meaning Great Leader) by the Adivasis of Chhotanagpur.