Option 1 -> Article 312 deals with All India Services, not the Election Commission.
Option 2 -> Article 315 pertains to Public Service Commissions for the Union and States, not election matters.
Option 3 -> Article 324 specifically establishes the Election Commission and grants it powers for superintendence, direction, and control of elections.
Option 4 -> Article 330 deals with reservation of seats for SCs and STs in Lok Sabha, not the Election Commission.
Hence, Option 3: Article 324 -> This article establishes an independent Election Commission to ensure free and fair elections by providing it with comprehensive powers over the entire electoral process, including preparation of electoral rolls and conduct of elections to Parliament, State Legislatures, and the offices of President and Vice-President -> correct