What is the correct sequence of the riven Godavari, Mahanadi, Narmada and Tapi in the descending order of their lengths? (a) Godavari – Mahanadi – Narmada – Tapi (b) Godavari – Narmada – Mahanadi – Tapi (c) Narmada – Godavari – Tapi – Mahanadi (d) Narmada – Tapi – Godavari – Mahanadi