Explanation:

Here's the thing, let’s break down what each option is about:

- Karnataka: Big on cultural festivals, but Sao Joao isn’t one of them.

- Kerala: Known for Onam, Thrissur Pooram, and boat races—not Sao Joao.

- Tamil Nadu: Has Pongal, Karthigai Deepam, and more, but again, no Sao Joao.

- Goa: This is where Sao Joao truly comes alive. It’s a colorful monsoon festival celebrated by the Catholic community, with people jumping into wells and water bodies for fun, wearing flower crowns. The festival honors St. John the Baptist.

So, you picked option 4—Goa.