The correct answer is Tej Bahadur Sapru.

• Tej Bahadur Sapru played the role of mediator in Gandhi-Irwin Pact.

• Tej Bahadur Sapru
  • ​Sir Tej Bahadur Sapru was an eminent lawyer, political leader in India during the British Raj.
  • Tej Bahadur Sapru was born in 1875 in Aligarh, in a Kashmiri Hindu family.
  • He was educated at Agra College.
  • Sapru criticized Mahatma Gandhi's leadership.
  • He also criticized the Non-Cooperation Movement and the Salt Satyagraha.
  • He acted as a mediator which helped him to broker the Gandhi-Irwin Pact.
  • Gandhi-Irwin Pact resulted at the end of the Salt Satyagraha.
  • He also acted as a mediator to end the Poona Pact, an agreement between Gandhi, B.R. Ambedkar and the British government.

• Motilal Nehru
  • ​Motilal Nehru was an Indian lawyer and politician belonging to the Indian National Congress.
  • He served as the Congress President twice, 1919–1920 and 1928–1929.
  • He was a member of the Nehru-Gandhi family
  • He was the father of Jawaharlal Nehru, who served as the first Prime Minister of India.
• Annie Besant
  • Annie Besant was a British socialist, theosophist, women's rights activist.
  • She also became involved in politics in India.
  • She joined the Indian National Congress.
  • In 1916, she launched the Home Rule League to campaign for democracy in India.
  • This directed to her election as president of the Indian National Congress, in 1917. 
• Chintamani
  • ​​Sir Chintamani was an Indian editor, journalist, liberal politician.
  • He was born on the Telugu New Year's Day (Ugadi) n Andhra Pradesh.
  • He was Chief editor of The Leader between 1909 and 1934.
  • Chintamani was appointed as the Education Minister of the United Provinces of British India as a part of the Dyarchy system of the Government of India Act 1919.