Option (c) is the correct sequence of occurrences of rivers from Chennai to Kolkata when travelled by road (shortest distance). The Penneru river rises in Nandi Hills in Chikballapura District of Karnataka. The Krishna river rises in western Maharashtra in the Western Ghats range near the town of Mahabaleshwar. The Godavari river, the largest Peninsular river, originates in Triambakeshwar of Maharashtra. Mahanadi river originates in the Sihawa mountains in the Dhamtari district of Chhattisgarh. Subarnarekha river originates near Piska/Nagri, near Ranchi, in Jharkhand. So, we shall encounter Penneru river first, followed by Krishna river, Godavari river, Mahanadi river and, towards the end, Subarnarekha river.