Goa’s eastern border is shared with the state of:

Karnataka
Maharashtra
Gujarat
Andhra Pradesh

The correct answer is Karnataka.

Goa is a state in western India. It is bordered by the state of Maharashtra to the north, the state of Karnataka to the east, the Arabian Sea to the west, and the Union Territory of Daman and Diu to the south.

The state of Karnataka is located in the southern part of India. It is bordered by the states of Goa to the north, Maharashtra to the west, Andhra Pradesh to the east, Tamil Nadu to the south, and Kerala to the southwest.

The state of Maharashtra is located in the western part of India. It is bordered by the states of Gujarat to the north, Madhya Pradesh to the east, Chhattisgarh to the southeast, Andhra Pradesh to the south, Karnataka to the southwest, Goa to the west, and the Arabian Sea to the west.

The state of Gujarat is located in the northwestern part of India. It is bordered by the states of Rajasthan to the west, Madhya Pradesh to the east, Maharashtra to the south, and the Arabian Sea to the west.

The state of Andhra Pradesh is located in the southeastern part of India. It is bordered by the states of Telangana to the north, Chhattisgarh to the northeast, Odisha to the east, Tamil Nadu to the south, Karnataka to the southwest, and the Bay of Bengal to the east.