The correct answer is 1, 2 and 3. Key Points Raja Mahendra Pratap​ He was a journalist, writer, socialist reformer, and revolutionary Indian freedom fighter. He also became the President of the Provisional Government of India established on 1 December 1915 in Kabul, Afghanistan. He belonged to the ruling Jat family of the princely state of Mursan in the Hathras district of Uttar Pradesh. He left India in 1914 to gather outside support in order to fight British colonial rule. He went to Switzerland where he was given the Order of Red Eagle by Kaiser Wilhelm II, met German diplomats Werner Otto von Hentig, etc. in Berlin, met the Khedive of Egypt in Vienna, Enver Pasha in Turkey, Rauf Bey in Ispahan, and Habibullah in Kabul. With his visits to so many different places, he tried to gather support against the Britishers. He published the 'World Federation Monthly Magazine' in 1929 in Japan and during the second world war he was in Tokyo and continued his movement from the 'World Federation Centre' to uproot the Britishers from India. ​ Maulana Barkatullah ​He was an Indian revolutionary from Bhopal, Madhya Pradesh, and served as the Prime Minister of the Provisional Government of India. He carried out his revolutionary activities from abroad with fiery speeches and revolutionary writings in leading newspapers. He came in contact with Raja Mahendra Pratap and Lala Hardayal while he was in England and was also friends with the Afghan Emir. He along with others founded the Ghadar Party in San Francisco in 1913. He also went to several countries to seek support for the freedom of India from famous leaders like Kaiser Wilhelm II, Amir Habibullah Khan, Mohammed Resched, Ghazi Pasha, Lenin, and Hitler. ​Lala Hardayal ​He was an Indian nationalist and revolutionary freedom fighter. He was awarded a scholarship from Oxford University in 1905 and moved to London where in a letter to 'The Indian Sociologist' he depicted his anarchist ideas. He gave up his scholarship and returned to India in 1908. In 1909, he went to Paris and became editor of the Vande Mataram. Other places visited by him were Algeria, Martinique, Boston, and California.