Step 1: Clarify the idea.
“Partyless democracy” proposes governance through people’s institutions without the dominance of political parties, aiming to reduce factionalism and money/muscle power.
Step 2: JP Narayan’s advocacy.
During the 1970s, especially in his {Total Revolution} movement, Jayaprakash Narayan (JP) explicitly argued for a {partyless} system grounded in decentralized people’s power.
Step 3: Differentiate from other thinkers.
M. N. Roy developed Radical Humanism; Gandhi envisioned non-partisan village & panchayat democracy but the textbook association of “partyless democracy” as a slogagenda is with JP; Acharya Narendra Deo was a key socialist leader, not the proponent of this specific model.
Step 4: Conclude.
\[
\boxed{\text{Jayaprakash Narayan (Option D).}}
\]