Option 1: Goa - Mangalore
This option is incorrect. The Konkan Railway does not connect Goa and Mangalore directly.
Option 2: Roha - Mangalore
This is the correct answer. The Konkan Railway connects Roha, a city in Maharashtra, with Mangalore, a city in Karnataka. It is a 741-kilometer long railway line that covers various regions of Maharashtra, Goa, and Karnataka.
Option 3: Kanyakumari - Mangalore
This option is incorrect. The Konkan Railway does not connect Kanyakumari and Mangalore directly.
Option 4: Kanyakumari - Mumbai
This option is incorrect. The Konkan Railway does not connect Kanyakumari and Mumbai directly.
In conclusion, the Konkan Railway connects Roha and Mangalore, making option 2 the correct answer.