Who among the following had invented the idea of "non-Congressism"?

Ram Manohar Lohia

The correct answer is Option (4) → Ram Manohar Lohia

"Ram Manohar Lohia (1910-1967): Socialist leader and thinker; freedom fighter and among the founders of the Congress Socialist Party; after the Electoral verdict C. Natarajan Annadurai (1909-1969): Chief Minister of Madras (Tamil Nadu) from 1967; a journalist, popular writer and orator; initially associated with the Justice Party in Madras province; later joined Dravid Kazagham (1934); formed DMK as a political party in 1949; a proponent of Dravid culture, he was opposed to imposition of Hindi and led the anti-Hindi agitations; supporter of greater autonomy to States. It was in this context of heightened popular discontent and the polarisation of political forces that the fourth general elections to the Lok Sabha and State Assemblies were held in February 1967. The Congress was facing the electorate for the first time without Nehru. split in the parent party, the leader of the Socialist Party and later the Samyukta Socialist Party; Member, Lok Sabha, 1963 67; founder editor of Mankind and Jan, known for original contribution to a non-European socialist theory; as political leader, best known for sharp attacks on Nehru, strategy of non-Congressism, advocacy of reservation for backward castes and opposition to English."