What are the best Rail Passes in India?

The best Rail Passes in India according to Viator travelers are: <br/><ul><li class="my-2 my-lg-0"><a href="https://avionero.partner.viator.com/tours/Agra/Agra-Taj-Mahal-Skip-the-Line-Entrance-Ticket/d4547-9512P14" target="_blank" rel="noopener">Taj Mahal entrance ticket with optional add-ons</a></li><li class="my-2 my-lg-0"><a href="https://avionero.partner.viator.com/tours/Goa/CULTURAL-and-HISTORIC-DAY-TOUR-ATTRACTIONS-Churches-Temples-and-Spice-Plantation/d4594-125057P5" target="_blank" rel="noopener">CULTURAL & HISTORIC DAY TOUR ATTRACTIONS - Churches, Temples & Spice Plantation</a></li><li class="my-2 my-lg-0"><a href="https://avionero.partner.viator.com/tours/Jaipur/Private-Transfer-From-Jaipur-to-Agra-including-Fatehpur-Sikri/d4627-22327P44" target="_blank" rel="noopener">Private Transfer From Jaipur to Agra including Fatehpur Sikri</a></li><li class="my-2 my-lg-0"><a href="https://avionero.partner.viator.com/tours/Chennai/Hello-travellers-here-I-am-to-explore-the-city-with-youuuu/d4624-194311P2" target="_blank" rel="noopener nofollow">Hello travellers here I am to explore the city with youuuu</a></li></ul>