Step 1: Connect Panchayati Raj with constitutional design.
The 73rd Constitutional Amendment Act, 1992 inserted Part IX (Articles 243–243O) and the 11th Schedule, giving a constitutional base to local self-government (PRIs).
Step 2: Map each option to Panchayati Raj features.
- Decentralisation of power (A): Power, functions, and finances devolved to local bodies (Gram Panchayat, Panchayat Samiti, Zila Parishad).
- Public participation (B): Gram Sabha ensures direct citizen involvement in local decision-making.
- Community development (C): PRIs implement local development programmes tailored to community needs.
Step 3: Conclude.
Since all three are true features of Panchayati Raj, (D) All of these is correct.
\[
\boxed{\text{All of these (Option D).}}
\]