Which is the best Nifty-based index fund to buy basis expense ratio and tracking error?

Choosing the best Nifty-based index fund involves more than just a low expense ratio. Experts emphasize that tracking error, which measures how closely a fund mirrors its benchmark, is crucial for long-term returns. While low costs are attractive, consistent replication accuracy, indicated by low tracking error, often proves more vital for passive investors aiming to capture market performance effectively.