A. Subarnarekha, Mahanadi, Godavari, Krishna, Pennar, Cauvery and Vaigai
B. Subarnarekha, Mahanadi, Krishna, Godavari, Cauvery, Vaigai and Pennar
C. Mahanadi, Subarnarekha, Godavari, Krishna, Cauvery, Pennar and Vaigai
D. Mahanadi, Subarnarekha, Krishna, Godavari, Cauvery, Vaigai and Pennar
✅ The correct answer is option A.