The correct answer is option-2, Goa. Goa is most famous for its beautiful sea beaches.

Regarding the other options:

- Option-1, Gujarat, although it has a coastline, it is not as renowned as Goa for its beaches.

- Option-3, Tamil Nadu, has some scenic beaches, but they are not as popular as the ones in Goa.

- Option-4, Orissa (now Odisha), is also home to some stunning beaches, but again, they are not as well-known as the beaches in Goa.

Goa, on the other hand, is famous for its pristine and picturesque beaches that attract tourists from all over the world. From popular spots like Calangute and Baga Beach to more secluded ones like Palolem and Arambol, Goa offers a diverse range of beach experiences. Its vibrant beach shacks, water sports activities, and captivating sunsets make it a top tourist destination for beach lovers.