The correct answer is: A) Goa and Maharashtra.
The Konkan Railway is a 760-kilometre (470 mi) long railway line along the western coast of India. It connects Mangalore in Karnataka to Roha in Maharashtra. The railway line was built between 1990 and 1998 and is one of the most scenic railways in India. It passes through the Western Ghats, a mountain range that runs along the western coast of India. The railway line is a major tourist attraction and is used by both locals and tourists.
Option B is incorrect because the Konkan Railway does not connect Karnataka and Andhra Pradesh. The Konkan Railway connects Karnataka and Maharashtra.
Option C is incorrect because the Konkan Railway does not connect Tamil Nadu and Puducherry. The Konkan Railway connects Karnataka and Maharashtra.
Option D is incorrect because the Konkan Railway does not connect Karnataka and Tamil Nadu. The Konkan Railway connects Karnataka and Maharashtra.