The correct answer is Sardar Patel.

Vallabhai Patel: 

• India's first home minister and deputy prime minister.
• He was instrumental in uniting India, for which he was called India's Bismarck (he was a German statesman who played a key role in the unification of Germany.) 
• He was also called 'Iron Man of India'.

• Lokmanya Tilak:
  • His famous declaration is “Swaraj is my birthright, and I shall have it”.
  • The British Government termed him as the "Father of Indian Unrest".
  • His followers bequeathed upon him the title of ‘Lokmanya’ meaning he who is revered by the people.
• Annie Besant was a British socialist, theosophist, women's rights activist, writer and orator, and supporter of Irish and Indian self-rule.
• Gopal Krishna Gokhale was the political guru of Mahatma Gandhi.
  • Gokhale was the founder of the Servants of India Society.
  • In 1905, when Gokhale was elected president of the Indian National Congress.
  • Notable work of Gokhale: English weekly newspaper, The Hitavad.