Step 1: Understanding the event — The 2025 Indian Premier League final was played on June 3, 2025, between Royal Challengers Bengaluru (RCB) and Punjab Kings, where RCB emerged victorious by 6 runs to clinch their first ever IPL title.
Wikipedia
Step 2: Evaluating the options — Among the given options, only Royal Challengers Bengaluru won the tournament. Mumbai Indians, Gujarat Titans, and Chennai Super Kings did not win the 2025 title.
Wikipedia
Step 3: Conclusion — Therefore, option (b) is correct.